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07-SEPTEMBER-2008 03:17:44 - Antianginal An antianginal is any drug used in the treatment of angina pectoris, a symptom of ischaemic heart disease. Drugs used are nitrates such as nitroglycerin glyceryl trinitrate or pentaerythritol tetranitrate; beta blockers, either cardioselectives such as acebutolol or metoprolol, or non-cardioselectives such as oxprenolol or sotalol; or calcium channel blockers, either Class I agents e.g., verapamil, Class II agents e.g., amlodipine, nifedipine, or the Class III agent diltiazem. Nitrates cause vasodilation of the venous capacitance vessels by simulating the endothelium-derived relaxing factor EDRF. Used to relieve both exertional and vasospastic angina by allowing venous pooling, reducing the pressure in the ventricles and so reducing wall tension and oxygen requirements in the heart. Short-acting nitrates are used to abort angina attacks that have occurred, while longer-acting nitrates are used in the prophylactic management of the condition. Beta blockers are used in the prophylaxis of exertional angina by reducing the work the heart is allowed to perform below the level that would provoke an angina attack. They cannot be used in vasospastic angina and can precipitate heart failure. Calcium ion Ca++ antagonists Calcium channel blockers are used in the treatment of both exertional and vasospastic angina. In vitro, they dilate the coronary and peripheral arteries and have negative inotropic and chronotropic effects - decreasing afterload, improving myocardial efficiency, reducing heart rate and improving coronary blood flow. In vivo, the vasodilation and hypotension trigger the baroreceptor reflex. Therefore the net effect is the interplay of direct and reflex actions. Class I antiarrhythmic agents have the most potent negative inotropic effect and may cause heart failure; Class II agents do not depress conduction or contractility; the Class III agent has negligible inotropic effect and causes almost no reflex tachycardia. v d e Major drug groups Gastrointestinal tract/metabolism A stomach acid Antacids, H2 antagonists, Proton pump inhibitors Antiemetics Laxatives Antidiarrhoeals/Antipropulsives Anti-obesity drugs Anti-diabetics Vitamins Dietary minerals Blood and blood forming organs B Antithrombotics Anticoagulants, Antiplatelets, Thrombolytics Antihemorrhagics Cardiovascular system C cardiac therapy/antianginals Cardiac glycosides, Antiarrhythmics, Cardiac stimulant Antihypertensives Diuretics Vasodilators Beta blockers renin-angiotensin system ACE inhibitors, Angiotensin II receptor antagonists, Renin inhibitors Antihyperlipidemics Skin D Emollients Cicatrizant Antipruritics Reproductive system G Hormonal contraception Fertility agents SERMs Sex hormones Endocrine system H Corticosteroids Sex hormones Thyroid hormones Antithyroid agent Infections and infestations J, P Antibiotics Antivirals Vaccines Antifungals Antiparasitic Antiprotozoals, Anthelmintics Malignant and immune disease L Anticancer agents Immunostimulators Immunosuppressants Muscles, bones, and joints M Anabolic steroids Anti-inflammatories NSAID Antirheumatics Corticosteroids Muscle relaxants Brain and nervous system N Anesthetics General, Local Analgesics Anticonvulsants Mood stabilizers Psycholeptic Anxiolytics, Antipsychotics, Hypnotics/Sedatives Psychoanaleptic Antidepressants, Stimulants/Psychostimulants Respiratory system R Bronchodilators Decongestants H1 antagonists Other ATC V Antidotes Contrast media Radiopharmaceuticals Dressing Retrieved from http://en..org/wiki/Antianginal Categories: Antianginals Views Article Discussion this page History Personal tools Log in / create account Navigation Main page Contents Featured content Current events Random article Search Go Search Interaction Community portal Recent changes Contact Donate to Help Toolbox What links here Related changes Upload file Special pages Printable version Permanent link Cite this page Languages Türkçe Català Português Türkçe This page was last modified on 26 October 2007, at 00:45
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