Angiotensin antagonist drugs
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Drugs that act directly on the renin-angiotensin system can cause injury and death to the developing fetus. Introduction. Angiotensin II receptor type 1 (AT 1) antagonist (i.e, angiotensin II receptor blocker, and in conformity with professional standards in the field. Readers are advised that decisions regarding use of drugs are complex TWIZLA is a combination of two drugs with antihypertensive properties: A calcium ion antagonist, amlodipine besylate, and an angiotensin II receptor blocker, telmisartan. Both telmisartan and
ACE Inhibitors and Angiotensin II Receptor Antagonists
Are the medications of choice for patients with diabetes. They are not recommended for initial treatment in patients with African ancestry, in whom they appear to increase the risk of stroke when used for initial treatment.A dry, irritating cough is the most common adverse effect, with estimates of occurrence in up to 20% in North American and Europe populations and up to 40% in Asian populations (1, 2). Angioedema is the most serious adverse effect and, if it affects the oropharynx, can be fatal. Angioedema is most common among patients with African ancestry and those who smoke. ACE inhibitors may increase serum potassium and creatinine levels, especially in patients with chronic kidney disease and those taking potassium-sparing diuretics, potassium supplements, or nonsteroidal anti-inflammatory drugs (NSAIDs). ACE inhibitors are contraindicated during pregnancy. In patients with a renal disorder, serum creatinine and potassium levels are monitored at least every 3 months. Patients who have stage 3 nephropathy (estimated glomerular filtration rate [GFR] of 60 mL/minute to > 30 mL/minute) and are given ACE inhibitors can usually tolerate an increase in serum creatinine up to 30 to 35% above baseline. ACE inhibitors can cause acute kidney injury in patients who have hypovolemia, severe heart failure, severe bilateral renal artery stenosis, or severe stenosis in the artery to a solitary kidney.Thiazide-type diuretics enhance the antihypertensive activity of ACE inhibitors and angiotensin II receptor blockers more than that of other classes of antihypertensives (3, 4). Spironolactone and eplerenone also appear to enhance the effect of ACE inhibitors.1. Israili ZH, Hall WD. Cough and angioneurotic edema associated with angiotensin-converting enzyme inhibitor therapy. A review of the literature and pathophysiology. Ann Intern Med 117(3):234-242, 1992. doi:10.7326/0003-4819-117-3-2342. Woo KS, Nicholls MG. High prevalence of persistent cough with angiotensin converting enzyme inhibitors in Chinese. Br J Clin Pharmacol 40(2):141-144, 1995.3. Townsend RR, Holland OB. Combination of converting enzyme inhibitor with diuretic for the treatment of hypertension. Arch Intern Med 150(6):1175-1183, 1990.4. Lacourcière Y, Poirier L, Lefebvre J, Ross SA, Leenen FH. Increasing the doses of both diuretics and angiotensin receptor blockers is beneficial in subjects with uncontrolled systolic hypertension. Can J Cardiol 26(8):313-319, 2010. doi:10.1016/s0828-282x(10)70442-6Angiotensin II Receptor Blockers for HypertensionAngiotensin II receptor blockers (see table Oral ACE Inhibitors and Angiotensin II Receptor Blockers for Hypertension) block angiotensin II receptors and therefore interfere with the renin-angiotensin system. Angiotensin II receptor blockers and ACE inhibitors are equally effective as antihypertensives. Angiotensin II receptor blockers may provide added benefits via tissue ACE blockade. The 2 classes have the same beneficial effects in patients with left ventricular failure or with nephropathy due to type 1 diabetes. An angiotensin II receptor blocker should not be used together with an ACE inhibitor, but when used
ACE inhibitors – angiotensin II receptor antagonists: A useful
Useful For Suggests clinical disorders or settings where the test may be helpful Evaluation of patients with suspected sarcoidosis Method Name A short description of the method used to perform the test Spectrophotometry (SP) NY State Available Indicates the status of NY State approval and if the test is orderable for NY State clients. Yes Reporting Name Lists a shorter or abbreviated version of the Published Name for a test Angiotensin Converting Enzyme, S Aliases Lists additional common names for a test, as an aid in searching Angiotensin-1-Converting Enzyme Kinase II Peptidylpeptide Hydrolase SACE (Serum Angiotensin Converting Enzyme) Sarcoidosis Serum Angiotensin Converting Enzyme ACE (Angiotensin Converting Enzyme) Specimen Type Describes the specimen type validated for testing Serum Necessary Information The use of angiotensin converting enzyme (ACE)-inhibiting antihypertensive drugs will cause decreased ACE values. Patients taking ACE inhibitors, such as captopril and enalapril, will have extremely low or unmeasurable ACE activity. Indicate on the request form if the patient is on ACE inhibitors. Specimen Required Defines the optimal specimen required to perform the test and the preferred volume to complete testing Collection Container/Tube: Preferred: Serum gel Acceptable: Red top Submission Container/Tube: Plastic vial Specimen Volume: 0.5 mL Collection Instructions: Centrifuge and aliquot serum into a plastic vial Forms Specimen Minimum Volume Defines the amount of sample necessary to provide a clinically relevant result as determined by the testing laboratory. The minimum volume is sufficient for one attempt at testing. 0.5 mL Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected Gross hemolysis Reject Gross lipemia Reject Gross icterus Reject Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included Specimen Type Temperature Time Special Container Serum Ambient 24 hours Refrigerated (preferred) 7 days Frozen 180 days Useful For Suggests clinical disorders or settings where the test may be helpful Evaluation of patients with suspected sarcoidosis Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test Angiotensin converting enzyme (ACE) is integral to the renin-angiotensin system (RAS), which maintains blood pressure by regulation of fluid volume and vascular tension. Its peptidase action on the decapeptide angiotensinogen I results in the hydrolysis of a terminal histidyl leucine dipeptide and the formation of the octapeptide angiotensin II, a potent vasoconstrictor that increases blood pressure. ACE activity is increased in sarcoidosis, a systemic granulomatous disease that commonly affects the lungs. In sarcoidosis, ACE is thought to be produced by epithelioid cells and macrophages of the granuloma. ACE activity reflects the severity of sarcoidosis: 68% positivity in those with stage I sarcoidosis, 86% in stage II sarcoidosis, and 91% in stage III sarcoidosis. Other conditions such as Gaucher disease, leprosy, untreated hyperthyroidism, psoriasis, premature infants with respiratory distress syndrome, adults with amyloidosis, and histoplasmosis have been associated with increased serum ACE activity. Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals basedOrexin Receptor Antagonists as Adjunct Drugs for the Treatment
Blood Pressure (Hypertension) Lisinopril Amlodipine Hydrochlorothiazide Atenolol Norvasc Carvedilol Popular comparisons Losartan vs amlodipine Losartan vs lisinopril Losartan vs olmesartan Losartan vs irbesartan More about Losartan More about Metoprolol Ratings & Reviews Losartan has an average rating of 4.5 out of 10 from a total of 572 ratings on Drugs.com. 26% of reviewers reported a positive effect, while 49% reported a negative effect. Metoprolol has an average rating of 5.8 out of 10 from a total of 651 ratings on Drugs.com. 41% of reviewers reported a positive effect, while 33% reported a negative effect. View all 572 reviews View all 651 reviews Drug Class Angiotensin receptor blockers Cardioselective beta blockers Side Effects Losartan side effects Metoprolol side effects Generic Availability Lower cost generic N/A Pricing and Coupons * Prices are without insurance Quantity 50 each Strength 50 mg Per Unit* $0.63 Cost* $31.30 View all Losartan prices We could not find an exact match for this medicine. Try searching the Price Guide directly. Get free Discount Card Get free Discount Card Dosage Forms Available Oral tablet N/A Brand Names Arbli, Cozaar Kapspargo Sprinkle, Lopressor, Metoprolol Succinate ER, Metoprolol Tartrate, Toprol-XL Half Life The half-life of a drug is the time taken for the plasma concentration of a drug to reduce to half its original value. 4.4 hours 4 hours CSA Schedule ** View glossary of terms Is not subject to the Controlled Substances Act. Is not subject to the Controlled Substances Act. Pregnancy Category See the full pregnancy warnings document. See the full pregnancy warnings document. Drug Interactions A total of 323 drugs are known to interact with Losartan: 32 major drug interactions (165 brand and generic names) 275 moderate drug interactions (1327 brand and generic names) 16 minor drug interactions (39 brand and generic names) A total of 541. Drugs that act directly on the renin-angiotensin system can cause injury and death to the developing fetus. Introduction. Angiotensin II receptor type 1 (AT 1) antagonist (i.e, angiotensin II receptor blocker, and in conformity with professional standards in the field. Readers are advised that decisions regarding use of drugs are complex TWIZLA is a combination of two drugs with antihypertensive properties: A calcium ion antagonist, amlodipine besylate, and an angiotensin II receptor blocker, telmisartan. Both telmisartan andWhat Are Angiotensin Receptor Blockers? A Complete Guide - Marley Drug
On age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this. Interpretation Provides information to assist in interpretation of the test results An elevation in the level of serum angiotensin converting enzyme (ACE), along with radiographic evidence of infiltrates or adenopathy and organ biopsies showing noncaseating epithelial granulomas is suggestive of a diagnosis of sarcoidosis. Normal, healthy children and infants are known to have ACE activity levels greater than the adult reference interval. Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances Spinal fluid angiotensin converting enzyme (ACE) activity to aid the diagnosis of neurosarcoidosis has been reported; however, there is insufficient evidence to support ACE being used for this purpose. Clinical Reference Recommendations for in-depth reading of a clinical nature 1. Liebermann J: Elevation of serum angiotensin-converting-enzyme (ACE) level in sarcoidosis. Am J Med. 1975;59:365-372 2. Rodriguez GE, Shin BC, Abernathy RS, Kendig EL Jr: Serum angiotensin-converting enzyme activity in normal children and in those with sarcoidosis. J Pediatr. 1981;99:68-72 3. Personal observations from a Mayo pediatric normal range study using a manual method (Hana) 4. Maguire GA, Price CP: A continuous monitoring spectrophotometric method for the measurement of angiotensin-converting enzyme in human serum. Ann Clin Biochem. 1985;22:204-210 5. Allen DW, Rajagopal V: Other adjunctive drugs for coronary intervention: beta-blockers, calcium-channel blockers, and angiotensin-converting enzyme inhibitors. In: Tropol EJ, Teirstein P, eds. Textbook of Interventional Cardiology. 8th ed. Elsevier; 2020:214-222 Method Description Describes how the test is performed and provides a method-specific reference Angiotensin converting enzyme (ACE) catalyzes the conversion of angiotensin I to angiotensin II. The enzyme also mediates the cleavage of the synthetic substrate N-(3-[2-furyl]acryloyl)-L-phenylalanylglycylglycine (FAPGG) into an amino acid derivative and a dipeptide. The kinetic of this cleavage reaction is measured by recording the decrease in absorbance at 340 nm.(Package insert: Buhlmann ACE Kinetic; 01/2013) PDF Report Indicates whether the report includes an additional document with charts, images or other enriched information No Day(s) Performed Outlines the days the test is performed. This field reflects the day that the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time before the test is performed. Some tests are listed as continuously performed, which means that assays are performed multiple times during the day. Monday through Friday Report Available The interval of time (receipt of sample at Mayo Clinic Laboratories to results available) taking into account standard setup days and weekends. The first day is the time that it typically takes for a result to be available. The last day is the time it might take, accounting for any necessary repeated testing. 1 to 3 days Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded 7 days Performing Laboratory Location Indicates the location of the laboratory that performs the testList of Angiotensin receptor blockers (angiotensin II inhibitors
Component of the cell. In most cases the interaction consists of a loose, reversible binding of the drug molecule, although some drugs can form strong chemical bonds with their target sites, resulting in long-lasting effects. Three types of target molecules can be distinguished: (1) receptors, (2) macromolecules that have specific cellular functions, such as enzymes, transport molecules, and nucleic acids, and (3) membrane lipids. Receptors Receptors are protein molecules that recognize and respond to the body’s own (endogenous) chemical messengers, such as hormones or neurotransmitters. Drug molecules may combine with receptors to initiate a series of physiological and biochemical changes. Receptor-mediated drug effects involve two distinct processes: binding, which is the formation of the drug-receptor complex, and receptor activation, which moderates the effect. The term affinity describes the tendency of a drug to bind to a receptor; efficacy (sometimes called intrinsic activity) describes the ability of the drug-receptor complex to produce a physiological response. Together, the affinity and the efficacy of a drug determine its potency. Differences in efficacy determine whether a drug that binds to a receptor is classified as an agonist or as an antagonist. A drug whose efficacy and affinity are sufficient for it to be able to bind to a receptor and affect cell function is an agonist. A drug with the affinity to bind to a receptor but without the efficacy to elicit a response is an antagonist. After binding to a receptor, an antagonist can block the effect of an agonist. The degree of binding of a drug to a receptor can be measured directly by the use of radioactively labeled drugs or inferred indirectly from measurements of the biological effects of agonists and antagonists. Such measurements have shown that the following reaction generally obeys the law of mass action in its simplest form: drug + receptor ⇌ drug-receptor complex. Thus, there is a relationship between the concentration of a drug and the amount of drug-receptor complex formed. The structure-activity relationship describes the connection between chemical structure and biological effect. Such a relationship explains the efficacies of various drugs and has led to theAngiotensin-converting enzyme 2 and angiotensin 1–7: novel
With a beta-blocker may reduce the hospitalization rate for patients with heart failure. Angiotensin II receptor blockers may be safely used in anyone with an estimated GFR > 30 mL/minute to reduce cardiovascular risk and kidney disease progression.Incidence of adverse events is low; angioedema occurs but much less frequently than with ACE inhibitors. Precautions for use of angiotensin II receptor blockers in patients with renovascular hypertension, hypovolemia, and severe heart failure are the same as those for ACE inhibitors (see table Oral ACE Inhibitors and Angiotensin II Receptor Blockers for Hypertension). Angiotensin II receptor blockers are contraindicated during pregnancy.Calcium Channel Blockers for HypertensionDihydropyridines (see table Oral Calcium Channel Blockers for Hypertension) are potent peripheral vasodilators and reduce blood pressure by decreasing total peripheral vascular resistance (TPR); they sometimes cause reflexive tachycardia. The nondihydropyridinesverapamil and diltiazem slow the heart rate, decrease atrioventricular conduction, and decrease myocardial contractility. These medications should not be prescribed for patients with second- or third-degreeatrioventricular block or with left ventricular failure.Use of short-acting nifedipine should be avoided because of an increased risk of acute myocardial infarction (1).A calcium channel blocker is preferred to a beta-blocker in patients with angina pectoris who also have a bronchospastic disorder, with coronary spasms, or with Raynaud syndrome.1. Furberg CD, Psaty BM, Meyer JV.Nifedipine. Dose-related increase in mortality in patients with coronary heart disease. Circulation 1995;92(5):1326-1331. doi:10.1161/01.cir.92.5.1326Direct Renin Inhibitor for HypertensionAliskiren, a direct renin inhibitor, is used in the management of hypertension.As with ACE inhibitors and angiotensin IIreceptor blockers, aliskiren causes elevation of serum potassium and creatinine.Aliskiren should not be combined with ACE inhibitors or angiotensin II receptor blockers in patients with diabetes or renal disease (estimated GFR 60 mL/minute). It is also contraindicated during pregnancy. Beta-Blockers for HypertensionBeta-blockers are not first line agents for treatment of hypertension. However, they may be useful in patients with hypertension who have other disorders that may benefit from a beta-blocker, such as angina, previous myocardial infarction, or heart failure. Otherwise, beta-blockers are less protective against stroke and overall mortality than some other antihypertensives (1, 2). Beta-blockers (see table Oral Beta-Blockers for Hypertension) slow the heart rate and reduce myocardial contractility, thus reducing blood pressure. All beta-blockers are similar in antihypertensive efficacy. Cardioselective beta blockers (eg, acebutolol, atenolol, betaxolol, bisoprolol, metoprolol) are often preferred over nonselective agents because of potentially less bronchoconstriction and peripheral vasodilation, which is particularly relevant for patients withdiabetes (increasing risk of hypoglycemia), chronic peripheral arterial disease (impairing function), or chronic obstructive pulmonary disease (COPD, by potentiating bronchospasm). However, cardioselectivity is only relative and decreases as dose increases. Even cardioselective beta-blockers should be used with caution in patients with COPD with a prominent bronchospastic component. Beta-blockers with intrinsic sympathomimetic activity (eg, acebutolol, pindolol)Angiotensin-(1-5), an active mediator of renin-angiotensin system
Angioedema is edema of the deep dermis and subcutaneous tissues. It is usually acute but sometimes is a chronic mast cell–mediated reaction caused by exposure to a medication (eg, angiotensin-converting enzyme inhibitors), venom, dietary, pollen, or animal dander allergens, or it can be idiopathic. Angioedema can also be a hereditary or an acquired disorder characterized by an abnormal complement response. The main symptom is swelling, often of the face, mouth, and upper airways, which can be severe. Diagnosis is by examination. Treatment is with airway management as needed, elimination or avoidance of the allergen, and drugs to minimize swelling (eg, H1 blockers).(See also Overview of Allergic and Atopic Disorders and Hereditary and Acquired C1 Inhibitor Deficiency.)Angioedema is swelling (usually localized) of the subcutaneous tissues due to increased vascular permeability and extravasation of intravascular fluid. Known mediators of increased vascular permeability include the following:Mast cell–derived mediators (eg, histamine, leukotrienes, prostaglandins) Bradykinin and complement-derived mediatorsMast cell–derived mediators tend to also affect layers superficial to subcutaneous tissue, including the dermal-epidermal junction. There, these mediators cause urticaria and pruritus, which thus usually accompany mast cell–mediated angioedema.In bradykinin-mediated angioedema, the dermis is usually spared, so urticaria and pruritus are absent. In some cases, the mechanism and cause of angioedema are unknown. Several causes (eg, calcium channel blockers, fibrinolytic agents) have no identified mechanism; sometimes a cause (eg, muscle relaxants) with a known mechanism is overlooked clinically.Angioedema is usually acute or but can be chronic (> 6 weeks).There are hereditary and acquired forms characterized by an abnormal complement response.Acute angioedema is mast cell–mediated in > 90% of cases. Mast cell–mediated mechanisms include acute allergic, typically IgE-mediated reactions. IgE-mediated angioedema is usually accompanied by acute urticaria (local wheals and erythema in the skin) and itching. It may often be caused by the same allergens (eg, medication, venom, dietary, extracted allergens) that are responsible for acute IgE-mediated urticaria. Acute angioedema can also result from agents that directly stimulate mast cells without involving IgE. Causes can include opioids, radiopaque contrast agents, aspirin, and nonsteroidal anti-inflammatory drugs (NSAIDs).Angiotensin-converting enzyme (ACE) inhibitors cause about 30% of cases of acute angioedema seen in emergency departments (1, 2). ACE inhibitors can directly increase levels of bradykinin. The face and upper airways are most commonly affected. The intestine may also be affected, often presenting with intermittent abdominal pain and bloating. Urticaria does not occur. Angioedema may occur soon or years after therapy begins.The cause of chronic (> 6 weeks) angioedema is usually unknown. IgE-mediated mechanisms are rare, but chronic ingestion of an unsuspected medication or chemical (eg, penicillin in milk, a nonprescription medication, preservatives, other food additives) is sometimes the cause. A few cases are due to hereditary or acquired C1 inhibitor deficiency. Idiopathic angioedema is angioedema that occurs without urticaria, is chronic and recurrent, and has no identifiable cause.Hereditary angioedema and acquired angioedema are disorders that are characterized by abnormal complement responses and caused by deficiency or dysfunction of C1 inhibitor. Symptoms are those of bradykinin-mediated angioedema. 1. Agah R, Bandi V, Guntupalli. Drugs that act directly on the renin-angiotensin system can cause injury and death to the developing fetus. Introduction. Angiotensin II receptor type 1 (AT 1) antagonist (i.e, angiotensin II receptor blocker, and in conformity with professional standards in the field. Readers are advised that decisions regarding use of drugs are complex
Oral Angiotensin-Converting Enzyme (ACE) Inhibitors and Angiotensin II
The operator, as false-negative results have been observed and reported in the past.77 One explanation for some false negatives is that the provocation test was performed when the disease activity of the coronary vessels was reduced because of the fluctuating nature of CAS.Kashima et al. reported that false negative provocation tests were more often observed in patients on CCB at the time of and prior to the provocation test.78 This underlines the importance of withholding medication with vasoactive properties for at least 48 hours before the spasm provocation study.60,61If radial spasm occurs, administering a dose of 100 μg NTG and waiting for 15–30 minutes before starting the provocation procedure may be acceptable. Furthermore, using an Ach dose of 200 μg if spasm is not seen with the 100 μg dose, especially in patients for whom a high suspicion of CAS remains after the 100 μg dose, is advocated.67Impact of Positive Test on Management and PrognosisA positive diagnosis carries a prognostic value of future increased cardiovascular events.9 Several treatment strategies have been evaluated, some of which can help mitigate these negative outcomes.Lifestyle changes and avoidance of precipitating agents are of utmost importance, as many patients are unable to tolerate medical therapy because of side-effects. Therefore, smoking cessation and avoidance of drugs that potentiate coronary vasoconstriction, such as cocaine and sympathomimetic agents, are especially important in patients with VSA.79,80Furthermore, exercise and a healthy lifestyle will assure overall cardiovascular health. Statins and angiotensin-converting enzyme inhibitors/angiotensin-receptor blockers have been recommended in most patients with ED if they can tolerate them, such as those with hypertension. Ishii et al. studied the effects of statin therapy on patients with VSA and found it was correlated with a lower rate of cardiovascular events in VSA without significant coronary atherosclerotic stenosis.81More specific antianginal therapies such as CCB and nitrates remain the mainstays of therapy for VSA.82 CCBs dilate VSMCs and have negative inotropic and chronotropic effects.83 Most recently, they were studied in the EDIT-CMD trial, which showed no improvement in CFR but a reduction in CAS in patients with VSA who were on diltiazem 360 mg versus those on placebo.84 A greater proportion of patients on diltiazem progressed from having epicardial spasm to MVS or no spasms at all compared to those on placebo (47% versus 6%; p=0.006). This study once again demonstrated that CCBs can alleviate epicardial spasm, without apparent effects on microvascular non-endothelium-specific CMD.In practice, CCBs can be used in combination with one dihydropyridine agent (such as amlodipine or nifedipine) being used in addition to a non-dihydropyridine (verapamil or diltiazem) to potentiate each other’s effect on VSMC relaxation while avoiding bradycardia. High doses of each agent will often be required to stabilize the disease.CCBs have alsoAngiotensin II up-regulates angiotensin I-converting enzyme (ACE
To treat hypertension only in patients who have an estimated GFR 30 mL/minute; these diuretics are given at least twice a day (except for torsemide which can be given once a day).All diuretics except the potassium-sparing distal tubular diuretics (eg, spironolactone) cause significant potassium loss, so serum potassium is measured monthly until the level stabilizes. Unless serum potassium is normalized, potassium channels in the arterial walls close and the resulting vasoconstriction makes achieving the blood pressure (BP) goal difficult. Patients with potassium levels3.5 mEq/L (spironolactone, triamterene, amiloride) may be added. Addition of a potassium-sparing diuretic or potassium supplements is also recommended for patients who are also taking digoxin, have a known heart disorder, have an abnormal ECG, have ectopy orarrhythmias, or develop ectopy or arrhythmias while taking a diuretic. In most patients with diabetes, thiazide-type diuretics do not affect control of diabetes. Uncommonly, diuretics precipitate or worsen type 2 diabetes in patients with metabolic syndrome.A hereditary predisposition probably explains the few cases of gout due to diuretic-induced hyperuricemia. Diuretic-induced hyperuricemia without gout does not require treatment or discontinuation of the diuretic.Diuretics may slightly increase mortality in patients with a history of heart failure who do not have pulmonary congestion, particularly in those who are also taking an ACE inhibitor or angiotensin II receptor blocker and who do not drink at least 1400 mL (48 oz) of fluid daily. The increased mortality is probably related to diuretic-induced hyponatremia and hypotension.1. Roush GC, Ernst ME, Kostis JB, Tandon S, Sica DA. Head-to-head comparisons of hydrochlorothiazide with indapamide and chlorthalidone: antihypertensive and metabolic effects. Hypertension 65(5):1041-1046, 2015. doi:10.1161/HYPERTENSIONAHA.114.050212. Ishani A, Cushman WC, Leatherman SM, et al. Chlorthalidone vs. Hydrochlorothiazide for Hypertension-Cardiovascular Events. N Engl J Med 2022;387(26):2401-2410. doi:10.1056/NEJMoa22122703. Ishani A, Hau C, Raju S, et al. Chlorthalidone vs Hydrochlorothiazide and Kidney Outcomes in Patients With Hypertension: A Secondary Analysis of a Randomized Clinical Trial. JAMA Netw Open 2024;7(12):e2449576. Published 2024 Dec 2. doi:10.1001/jamanetworkopen.2024.495764. Agarwal R, Sinha AD, Tu W: Chlorthalidone for hypertension in Advanced CKD. Reply. N Engl J Med 386(14):1384, 2022. 5. Ott SM, LaCroix AZ, Ichikawa LE, Scholes D, Barlow WE. Effect of low-dose thiazide diuretics on plasma lipids: results from a double-blind, randomized clinical trial in older men and women. J Am Geriatr Soc 51(3):340-347, 2003. doi:10.1046/j.1532-5415.2003.51107.xACE Inhibitors for HypertensionACE inhibitors (see table Oral ACE Inhibitors and Angiotensin II Receptor Blockers for Hypertension) reduce blood pressure by interfering with the conversion of angiotensin I to angiotensin II and by inhibiting the degradation of bradykinin, thereby decreasing peripheral vascular resistance without causing reflex tachycardia. These medications reduce BP in many patients with hypertension, regardless of plasma renin activity. Because these medications provide renal protection, they (along with angiotensin II receptor blockers). Drugs that act directly on the renin-angiotensin system can cause injury and death to the developing fetus. Introduction. Angiotensin II receptor type 1 (AT 1) antagonist (i.e, angiotensin II receptor blocker, and in conformity with professional standards in the field. Readers are advised that decisions regarding use of drugs are complex TWIZLA is a combination of two drugs with antihypertensive properties: A calcium ion antagonist, amlodipine besylate, and an angiotensin II receptor blocker, telmisartan. Both telmisartan andRenin–Angiotensin System Inhibition in
Index; SBP, systolic blood pressure; HR, heart rate; IHD, ischemic heart disease; AF, atrial fibrillation; CKD, chronic kidney disease; EF, ejection fraction; TRPG, tricuspid regurgitation pressure gradient; BNP, brain natriuretic peptide; FEV1, forced expiratory volume in 1 second; GOLD, global initiative for chronic obstructive lung disease; ACE-I, angiotensin converting enzyme inhibitor; ARB, angiotensin II receptor blocker. Clinical outcomes During the mean follow-up period of 33.9 months, the primary endpoint event (all-cause mortality) occurred in 9 patients (10.5%) in the β-blocker group and 12 patients (26.1%) in the non-β-blocker group (log-rank P=0.039) (Figure 1). β-blocker therapy significantly reduced the risk of all-cause death in the univariate analysis (unadjusted hazard ratio [HR]: 0.41; 95% confidence interval [CI]: 0.17–0.99; P=0.047) (Table 2). However, no significant association was observed between β-blocker use and all-cause mortality in the multivariate analysis (Table 2). Evaluation of the causes of death revealed that in the non-β-blocker group, six, three, two, and one patients died of infection-unrelated COPD exacerbation, COPD exacerbation, sudden cardiac death, and acute HF, respectively. In the β-blocker group, three, two, two, and two patients died of infection-unrelated COPD exacerbation, COPD exacerbation, sudden cardiac death, and acute HF, respectively. The percentages of each cause of death did not significantly differ between the two treatment groups. Figure 1 Cumulative incidence of all-cause death.Note: During the mean follow-up period of 33.9 months, the mortality was higher in heart failure and COPD patients treated without vs with β-blockers (log-rank P=0.039).Abbreviation: COPD, chronic obstructive pulmonary disease. Table 2 HRs for the risk of all-cause mortalityAbbreviations: HR, hazard ratio; CI, confidence interval; BMI, body mass index; BNP, brain natriuretic peptide; EF, ejection fraction; ACE-I, angiotensin I converting enzyme inhibitor; ARB, angiotensin II receptor blocker; GOLD, global initiative for chronic obstructive lung disease; COPD, chronic obstructive pulmonary disease. The secondary endpoint events occurred in 35 patients (67.3%) in the carvedilol group and 9 patients (26.5%) in the bisoprolol group (log-rank P=0.112) (Figure 2). CHF and/or COPD exacerbation occurred in 29 patients (55.8%) in the carvedilol group and 6 patients (17.6%) in the bisoprolol group (log-rank P=0.033) (Figure 3). The rate of all-cause death did not significantly differ between the two groups (11.5% vs 8.8% in the carvedilol vs bisoprolol groups, data not shown). Univariate Cox regression analysis revealed that bisoprolol significantly reduced the risk of re-hospitalization due to CHF and/or COPD exacerbation (unadjusted HR: 0.38; 95% CI: 0.15–0.98; P=0.046) but carvedilol didComments
Are the medications of choice for patients with diabetes. They are not recommended for initial treatment in patients with African ancestry, in whom they appear to increase the risk of stroke when used for initial treatment.A dry, irritating cough is the most common adverse effect, with estimates of occurrence in up to 20% in North American and Europe populations and up to 40% in Asian populations (1, 2). Angioedema is the most serious adverse effect and, if it affects the oropharynx, can be fatal. Angioedema is most common among patients with African ancestry and those who smoke. ACE inhibitors may increase serum potassium and creatinine levels, especially in patients with chronic kidney disease and those taking potassium-sparing diuretics, potassium supplements, or nonsteroidal anti-inflammatory drugs (NSAIDs). ACE inhibitors are contraindicated during pregnancy. In patients with a renal disorder, serum creatinine and potassium levels are monitored at least every 3 months. Patients who have stage 3 nephropathy (estimated glomerular filtration rate [GFR] of 60 mL/minute to > 30 mL/minute) and are given ACE inhibitors can usually tolerate an increase in serum creatinine up to 30 to 35% above baseline. ACE inhibitors can cause acute kidney injury in patients who have hypovolemia, severe heart failure, severe bilateral renal artery stenosis, or severe stenosis in the artery to a solitary kidney.Thiazide-type diuretics enhance the antihypertensive activity of ACE inhibitors and angiotensin II receptor blockers more than that of other classes of antihypertensives (3, 4). Spironolactone and eplerenone also appear to enhance the effect of ACE inhibitors.1. Israili ZH, Hall WD. Cough and angioneurotic edema associated with angiotensin-converting enzyme inhibitor therapy. A review of the literature and pathophysiology. Ann Intern Med 117(3):234-242, 1992. doi:10.7326/0003-4819-117-3-2342. Woo KS, Nicholls MG. High prevalence of persistent cough with angiotensin converting enzyme inhibitors in Chinese. Br J Clin Pharmacol 40(2):141-144, 1995.3. Townsend RR, Holland OB. Combination of converting enzyme inhibitor with diuretic for the treatment of hypertension. Arch Intern Med 150(6):1175-1183, 1990.4. Lacourcière Y, Poirier L, Lefebvre J, Ross SA, Leenen FH. Increasing the doses of both diuretics and angiotensin receptor blockers is beneficial in subjects with uncontrolled systolic hypertension. Can J Cardiol 26(8):313-319, 2010. doi:10.1016/s0828-282x(10)70442-6Angiotensin II Receptor Blockers for HypertensionAngiotensin II receptor blockers (see table Oral ACE Inhibitors and Angiotensin II Receptor Blockers for Hypertension) block angiotensin II receptors and therefore interfere with the renin-angiotensin system. Angiotensin II receptor blockers and ACE inhibitors are equally effective as antihypertensives. Angiotensin II receptor blockers may provide added benefits via tissue ACE blockade. The 2 classes have the same beneficial effects in patients with left ventricular failure or with nephropathy due to type 1 diabetes. An angiotensin II receptor blocker should not be used together with an ACE inhibitor, but when used
2025-04-18Useful For Suggests clinical disorders or settings where the test may be helpful Evaluation of patients with suspected sarcoidosis Method Name A short description of the method used to perform the test Spectrophotometry (SP) NY State Available Indicates the status of NY State approval and if the test is orderable for NY State clients. Yes Reporting Name Lists a shorter or abbreviated version of the Published Name for a test Angiotensin Converting Enzyme, S Aliases Lists additional common names for a test, as an aid in searching Angiotensin-1-Converting Enzyme Kinase II Peptidylpeptide Hydrolase SACE (Serum Angiotensin Converting Enzyme) Sarcoidosis Serum Angiotensin Converting Enzyme ACE (Angiotensin Converting Enzyme) Specimen Type Describes the specimen type validated for testing Serum Necessary Information The use of angiotensin converting enzyme (ACE)-inhibiting antihypertensive drugs will cause decreased ACE values. Patients taking ACE inhibitors, such as captopril and enalapril, will have extremely low or unmeasurable ACE activity. Indicate on the request form if the patient is on ACE inhibitors. Specimen Required Defines the optimal specimen required to perform the test and the preferred volume to complete testing Collection Container/Tube: Preferred: Serum gel Acceptable: Red top Submission Container/Tube: Plastic vial Specimen Volume: 0.5 mL Collection Instructions: Centrifuge and aliquot serum into a plastic vial Forms Specimen Minimum Volume Defines the amount of sample necessary to provide a clinically relevant result as determined by the testing laboratory. The minimum volume is sufficient for one attempt at testing. 0.5 mL Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected Gross hemolysis Reject Gross lipemia Reject Gross icterus Reject Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included Specimen Type Temperature Time Special Container Serum Ambient 24 hours Refrigerated (preferred) 7 days Frozen 180 days Useful For Suggests clinical disorders or settings where the test may be helpful Evaluation of patients with suspected sarcoidosis Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test Angiotensin converting enzyme (ACE) is integral to the renin-angiotensin system (RAS), which maintains blood pressure by regulation of fluid volume and vascular tension. Its peptidase action on the decapeptide angiotensinogen I results in the hydrolysis of a terminal histidyl leucine dipeptide and the formation of the octapeptide angiotensin II, a potent vasoconstrictor that increases blood pressure. ACE activity is increased in sarcoidosis, a systemic granulomatous disease that commonly affects the lungs. In sarcoidosis, ACE is thought to be produced by epithelioid cells and macrophages of the granuloma. ACE activity reflects the severity of sarcoidosis: 68% positivity in those with stage I sarcoidosis, 86% in stage II sarcoidosis, and 91% in stage III sarcoidosis. Other conditions such as Gaucher disease, leprosy, untreated hyperthyroidism, psoriasis, premature infants with respiratory distress syndrome, adults with amyloidosis, and histoplasmosis have been associated with increased serum ACE activity. Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based
2025-04-20On age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this. Interpretation Provides information to assist in interpretation of the test results An elevation in the level of serum angiotensin converting enzyme (ACE), along with radiographic evidence of infiltrates or adenopathy and organ biopsies showing noncaseating epithelial granulomas is suggestive of a diagnosis of sarcoidosis. Normal, healthy children and infants are known to have ACE activity levels greater than the adult reference interval. Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances Spinal fluid angiotensin converting enzyme (ACE) activity to aid the diagnosis of neurosarcoidosis has been reported; however, there is insufficient evidence to support ACE being used for this purpose. Clinical Reference Recommendations for in-depth reading of a clinical nature 1. Liebermann J: Elevation of serum angiotensin-converting-enzyme (ACE) level in sarcoidosis. Am J Med. 1975;59:365-372 2. Rodriguez GE, Shin BC, Abernathy RS, Kendig EL Jr: Serum angiotensin-converting enzyme activity in normal children and in those with sarcoidosis. J Pediatr. 1981;99:68-72 3. Personal observations from a Mayo pediatric normal range study using a manual method (Hana) 4. Maguire GA, Price CP: A continuous monitoring spectrophotometric method for the measurement of angiotensin-converting enzyme in human serum. Ann Clin Biochem. 1985;22:204-210 5. Allen DW, Rajagopal V: Other adjunctive drugs for coronary intervention: beta-blockers, calcium-channel blockers, and angiotensin-converting enzyme inhibitors. In: Tropol EJ, Teirstein P, eds. Textbook of Interventional Cardiology. 8th ed. Elsevier; 2020:214-222 Method Description Describes how the test is performed and provides a method-specific reference Angiotensin converting enzyme (ACE) catalyzes the conversion of angiotensin I to angiotensin II. The enzyme also mediates the cleavage of the synthetic substrate N-(3-[2-furyl]acryloyl)-L-phenylalanylglycylglycine (FAPGG) into an amino acid derivative and a dipeptide. The kinetic of this cleavage reaction is measured by recording the decrease in absorbance at 340 nm.(Package insert: Buhlmann ACE Kinetic; 01/2013) PDF Report Indicates whether the report includes an additional document with charts, images or other enriched information No Day(s) Performed Outlines the days the test is performed. This field reflects the day that the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time before the test is performed. Some tests are listed as continuously performed, which means that assays are performed multiple times during the day. Monday through Friday Report Available The interval of time (receipt of sample at Mayo Clinic Laboratories to results available) taking into account standard setup days and weekends. The first day is the time that it typically takes for a result to be available. The last day is the time it might take, accounting for any necessary repeated testing. 1 to 3 days Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded 7 days Performing Laboratory Location Indicates the location of the laboratory that performs the test
2025-03-28Component of the cell. In most cases the interaction consists of a loose, reversible binding of the drug molecule, although some drugs can form strong chemical bonds with their target sites, resulting in long-lasting effects. Three types of target molecules can be distinguished: (1) receptors, (2) macromolecules that have specific cellular functions, such as enzymes, transport molecules, and nucleic acids, and (3) membrane lipids. Receptors Receptors are protein molecules that recognize and respond to the body’s own (endogenous) chemical messengers, such as hormones or neurotransmitters. Drug molecules may combine with receptors to initiate a series of physiological and biochemical changes. Receptor-mediated drug effects involve two distinct processes: binding, which is the formation of the drug-receptor complex, and receptor activation, which moderates the effect. The term affinity describes the tendency of a drug to bind to a receptor; efficacy (sometimes called intrinsic activity) describes the ability of the drug-receptor complex to produce a physiological response. Together, the affinity and the efficacy of a drug determine its potency. Differences in efficacy determine whether a drug that binds to a receptor is classified as an agonist or as an antagonist. A drug whose efficacy and affinity are sufficient for it to be able to bind to a receptor and affect cell function is an agonist. A drug with the affinity to bind to a receptor but without the efficacy to elicit a response is an antagonist. After binding to a receptor, an antagonist can block the effect of an agonist. The degree of binding of a drug to a receptor can be measured directly by the use of radioactively labeled drugs or inferred indirectly from measurements of the biological effects of agonists and antagonists. Such measurements have shown that the following reaction generally obeys the law of mass action in its simplest form: drug + receptor ⇌ drug-receptor complex. Thus, there is a relationship between the concentration of a drug and the amount of drug-receptor complex formed. The structure-activity relationship describes the connection between chemical structure and biological effect. Such a relationship explains the efficacies of various drugs and has led to the
2025-04-23Angioedema is edema of the deep dermis and subcutaneous tissues. It is usually acute but sometimes is a chronic mast cell–mediated reaction caused by exposure to a medication (eg, angiotensin-converting enzyme inhibitors), venom, dietary, pollen, or animal dander allergens, or it can be idiopathic. Angioedema can also be a hereditary or an acquired disorder characterized by an abnormal complement response. The main symptom is swelling, often of the face, mouth, and upper airways, which can be severe. Diagnosis is by examination. Treatment is with airway management as needed, elimination or avoidance of the allergen, and drugs to minimize swelling (eg, H1 blockers).(See also Overview of Allergic and Atopic Disorders and Hereditary and Acquired C1 Inhibitor Deficiency.)Angioedema is swelling (usually localized) of the subcutaneous tissues due to increased vascular permeability and extravasation of intravascular fluid. Known mediators of increased vascular permeability include the following:Mast cell–derived mediators (eg, histamine, leukotrienes, prostaglandins) Bradykinin and complement-derived mediatorsMast cell–derived mediators tend to also affect layers superficial to subcutaneous tissue, including the dermal-epidermal junction. There, these mediators cause urticaria and pruritus, which thus usually accompany mast cell–mediated angioedema.In bradykinin-mediated angioedema, the dermis is usually spared, so urticaria and pruritus are absent. In some cases, the mechanism and cause of angioedema are unknown. Several causes (eg, calcium channel blockers, fibrinolytic agents) have no identified mechanism; sometimes a cause (eg, muscle relaxants) with a known mechanism is overlooked clinically.Angioedema is usually acute or but can be chronic (> 6 weeks).There are hereditary and acquired forms characterized by an abnormal complement response.Acute angioedema is mast cell–mediated in > 90% of cases. Mast cell–mediated mechanisms include acute allergic, typically IgE-mediated reactions. IgE-mediated angioedema is usually accompanied by acute urticaria (local wheals and erythema in the skin) and itching. It may often be caused by the same allergens (eg, medication, venom, dietary, extracted allergens) that are responsible for acute IgE-mediated urticaria. Acute angioedema can also result from agents that directly stimulate mast cells without involving IgE. Causes can include opioids, radiopaque contrast agents, aspirin, and nonsteroidal anti-inflammatory drugs (NSAIDs).Angiotensin-converting enzyme (ACE) inhibitors cause about 30% of cases of acute angioedema seen in emergency departments (1, 2). ACE inhibitors can directly increase levels of bradykinin. The face and upper airways are most commonly affected. The intestine may also be affected, often presenting with intermittent abdominal pain and bloating. Urticaria does not occur. Angioedema may occur soon or years after therapy begins.The cause of chronic (> 6 weeks) angioedema is usually unknown. IgE-mediated mechanisms are rare, but chronic ingestion of an unsuspected medication or chemical (eg, penicillin in milk, a nonprescription medication, preservatives, other food additives) is sometimes the cause. A few cases are due to hereditary or acquired C1 inhibitor deficiency. Idiopathic angioedema is angioedema that occurs without urticaria, is chronic and recurrent, and has no identifiable cause.Hereditary angioedema and acquired angioedema are disorders that are characterized by abnormal complement responses and caused by deficiency or dysfunction of C1 inhibitor. Symptoms are those of bradykinin-mediated angioedema. 1. Agah R, Bandi V, Guntupalli
2025-03-27The operator, as false-negative results have been observed and reported in the past.77 One explanation for some false negatives is that the provocation test was performed when the disease activity of the coronary vessels was reduced because of the fluctuating nature of CAS.Kashima et al. reported that false negative provocation tests were more often observed in patients on CCB at the time of and prior to the provocation test.78 This underlines the importance of withholding medication with vasoactive properties for at least 48 hours before the spasm provocation study.60,61If radial spasm occurs, administering a dose of 100 μg NTG and waiting for 15–30 minutes before starting the provocation procedure may be acceptable. Furthermore, using an Ach dose of 200 μg if spasm is not seen with the 100 μg dose, especially in patients for whom a high suspicion of CAS remains after the 100 μg dose, is advocated.67Impact of Positive Test on Management and PrognosisA positive diagnosis carries a prognostic value of future increased cardiovascular events.9 Several treatment strategies have been evaluated, some of which can help mitigate these negative outcomes.Lifestyle changes and avoidance of precipitating agents are of utmost importance, as many patients are unable to tolerate medical therapy because of side-effects. Therefore, smoking cessation and avoidance of drugs that potentiate coronary vasoconstriction, such as cocaine and sympathomimetic agents, are especially important in patients with VSA.79,80Furthermore, exercise and a healthy lifestyle will assure overall cardiovascular health. Statins and angiotensin-converting enzyme inhibitors/angiotensin-receptor blockers have been recommended in most patients with ED if they can tolerate them, such as those with hypertension. Ishii et al. studied the effects of statin therapy on patients with VSA and found it was correlated with a lower rate of cardiovascular events in VSA without significant coronary atherosclerotic stenosis.81More specific antianginal therapies such as CCB and nitrates remain the mainstays of therapy for VSA.82 CCBs dilate VSMCs and have negative inotropic and chronotropic effects.83 Most recently, they were studied in the EDIT-CMD trial, which showed no improvement in CFR but a reduction in CAS in patients with VSA who were on diltiazem 360 mg versus those on placebo.84 A greater proportion of patients on diltiazem progressed from having epicardial spasm to MVS or no spasms at all compared to those on placebo (47% versus 6%; p=0.006). This study once again demonstrated that CCBs can alleviate epicardial spasm, without apparent effects on microvascular non-endothelium-specific CMD.In practice, CCBs can be used in combination with one dihydropyridine agent (such as amlodipine or nifedipine) being used in addition to a non-dihydropyridine (verapamil or diltiazem) to potentiate each other’s effect on VSMC relaxation while avoiding bradycardia. High doses of each agent will often be required to stabilize the disease.CCBs have also
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