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Published byNeal Morrison Modified over 7 years ago
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ANGINA PECTORIS Classic angina is characterized by substernal squeezing chest pain, occurring with stress and relieved with rest or nitroglycerin. May radiate down the left arm. May be associated with nausea, vomiting, or diaphoresis.
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ANGINA
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STABLE ANGINA CLASSIFICATION
Exertional. Variant. Anginal Equivalent Syndrome. Prinzmetal’s Angina. Syndrome-X. Silent Ischemia.
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ANGINA: EXERTIONAL Coronary artery obstructions are not sufficient to result in resting myocardial ischemia. However, when myocardial demand increases, ischemia results.
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ANGINA: VARIANT ANGINA
Transient impairment of coronary blood supply by vasospasm or platelet aggregation. Majority of patients have an atherosclerotic plaque. Generalized arterial hypersensitivity. Long term prognosis very good.
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ANGINA: ANGINAL EQUIVALENT SYNDROME
Patient’s with exertional dyspnea rather than exertional chest pain. Caused by exercise induced left ventricular dysfunction.
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ANGINA: PRINZMETAL’S ANGINA
Spasm of a large coronary artery. Transmural ischemia. ST-Segment elevation at rest or with exercise. Not very common.
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ANGINA: SYNDROME X Typical, exertional angina with positive exercise stress test. Anatomically normal coronary arteries. Reduced capacity of vasodilation in microvasculature. Long term prognosis very good. Calcium channel blockers and beta blockers effective.
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ANGINA: SILENT ISCHEMIA
Very common. More episodes of silent than painful ischemia in the same patient. Difficult to diagnose. Holter monitor. Exercise testing.
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ANGINA: TREATMENT GOALS
Feel better. Live longer.
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ANGINA: PROGNOSIS Left ventricular function.
Number of coronary arteries with significant stenosis. Extent of jeoporized myocardium.
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STABLE ANGINA Risk stratification. Noninvasive testing.
Cardiac catheterization.
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STABLE ANGINA EVALUATION OF LV FUNCTION
Physical exam. CXR. Echocardiogram.
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STABLE ANGINA EVALUATION OF ISCHEMIA
History. Baseline Electrocardiogram. Exercise Testing.
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CCS ANGINA CLASSIFICATION
Class II. Class III. Class IV . Angina only with extreme exertion. Angina with walking . 1 to 2 blocks. Angina with walking. 1 block. Angina with minimal activity.
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STABLE ANGINA EXERCISE TESTING
The goal of exercise testing is to induce a controlled, temporary ischemic state during clinical and ECG observation.
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ANGINA: EXERCISE TESTING
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ANGINA: EXERCISE TESTING HIGH RISK PATIENTS
Significant ST-segment depression at low levels of exercise and/or heart rate<130. Fall in systolic blood pressure. Diminished exercise capacity. Complex ventricular ectopy at low level of exercise.
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ECG TREADMILL TEST IN WOMEN
Higher false-positive rate. Reduces procedures without loss of diagnostic accuracy. Only 30% of women need be referred for further testing.
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STABLE ANGINA GUIDELINES FOR NUCLEAR TEST
Diagnosis/prognosis for CAD. Non-diagnostic TEST. Abnormal resting ECG. Negative TEST with continued chest pain. Intermediate probability of disease.
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STABLE ANGINA GUIDELINES FOR NUCLEAR TEST
Defined CAD. Post infarct risk stratification. Risk stratification to determine need for revascularization ( viability study ).
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STABLE ANGINA DIPYRIDAMOLE NUCLEAR TEST
Near equivalent sensitivity/specificity with symptom-limited nuclear TEST. Most useful in patients who cannot exercise. Major contraindication is severe bronchospastic lung disease ( consider Dobutamine study ).
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STABLE ANGINA STRESS ECHO
Ischemia may cause wall motion abnormalities, no rise of fall in LVEF. Sensitivity/specificity same as nuclear testing. May be better in women.
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STRESS ECHO VS. NUCLEAR STRESS
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EXERCISE TESTING CONTRAINDICATIONS
MI—impending or acute. Unstable angina. Acute myocarditis / pericarditis. Acute systemic illness. Severe aortic stenosis. Congestive heart failure. Severe hypertension. Uncontrolled cardiac arrhythmias.
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STABLE ANGINA NON-INVASIVE EVALUATION
Non disabling Angina Resting LV Functions LV dysfunction Normal LV function Coronary Angiography Stress Test High Risk Low Risk Coronary Angiography Medical Therapy Stable Recurrent Angina Medical Therapy Coronary Angiography
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CARDIAC CATHETERIZATION INDICATIONS
Suspicion of multi-vessel CAD Determine if CABG/PTCA feasible Rule out CAD in patients with persistent/disabling chest pain and equivocal/normal noninvasive testing
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RISK FACTOR MODIFICATION
Hypertension Smoking Dyslipidemia Diabetes Mellitus Obesity Stress Homocysteine
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STABLE ANGINA TREATMENT OPTIONS
AAaaaaa Angina Treatment Option Percutaneous Intervention AAaaaaa AAaaaaa Medicine AAaaaaa CABG
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STABLE ANGINA MEDICAL TREATMENT
Beta-blockers Calcium channel blockers Nitrates Aspirin Statins ? ACE inhibitors
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STABLE ANGINA CONSIDERATIONS WHEN CHOOSING A DRUG
Effect on myocardium Effect on cardiac conduction system Effect on coronary/systemic arteries Effect on venous capitance system Circadian rhytm
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BETA-BLOCKERS Decrease myocardial oxygen consumption
Blunt exercise response Beta-one drugs have theoretical advantage Try to avoid drugs with intrinsic sympathomimetic activity First line therapy in all patients with angina if possible
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BETA-BLOCKERS
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BETA BLOCKERS SIDE EFFECTS
Bronchospasm Diminished exercise capacity Negative inotropy Sexual dysfunction Bradyarrhythmia Masking of hypoglycemia Increased claudication Hair loss
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BETA BLOCKERS COMMON AVAILABLE AGENTS
Propranolol Atenolol Metoprolol Nadolol Timolol
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CALCIUM CHANNEL BLOCKERS MECHANISMS OF ACTION
Arterial dilation/after-load reduction Coronary arterial vasodilation Prevention of coronary vasoconstriction Enhancement of coronary collateral flow Improved subendocardial perfusion Slowing of heart rate with diltiazem, verapamil
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CALCIUM CHANNEL BLOCKERS MECHANISMS OF ACTION
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CALCIUM CHANNEL BLOCKERS MECHANISMS OF ACTION
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CALCIUM CHANNEL BLOCKERS SIDE EFFECTS
Palpitations Headache Ankle edema Gingival hyperplasia
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CALCIUM CHANNEL BLOCKERS AVAILABLE AGENTS
Verapamil Diltiazem Nifedipine Nicardipine Amlodipine Felodipine Nisoldipine Bepridil
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NITRATES MECHANISMS OF ACTION
Nitric oxide has been identified as endothelium-derived relaxing factor Organic nitrates are therapeutic precursors of endothelium-derived relaxing factor
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NITRATES MECHANISMS OF ACTION
Venous vasodilation/pre-load reduction Arterial dilation/after-load reduction Coronary arterial vasodilation Prevention of coronary vasoconstriction Enhancement of coronary collateral flow Antiplatelet and antithrombotic effects
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NITRATES REDUCING TOLERANCE
Smaller doses Less frequent dosing Avoidance of long-acting formulations unless a prolonged nitrate-free interval is provided Build-in a nitrate-free interval o 8-12 hours
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NITRATES SIDE EFFECTS Headache Flushing Palpitations Tolerance
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NITRATES COMMON AVAILABLE AGENTS
Isorbide dinitrate Isorbide mononitrate Long-acting transdermal patches Nitroglycerin SL
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STABLE ANGINA TREATMENT OPTIONS
CABG PTCA
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STABLE ANGINA: 1-VESSEL CAD THERAPEUTIC STRATEGIES
Initiate pharmacologic treatment A. Nearly half of patients will become asymptomatic PTCA preferred alternative if medical therapy does not relieve angina or causes adverse effects
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STABLE ANGINA: 2-VESSEL CAD THERAPEUTIC STRATEGIES
Initial medical management in patients with mild ischemic symptoms and normal LV function Revascularization in patients who fail medical therapy Selection of PTCA vs. CABG depends on coronary anatomy, LV function, need for complete revascularization, and patient preference
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STABLE ANGINA: 3-VESSEL CAD THERAPEUTIC STRATEGIES
CABG in patients with left-main disease or 3-vessel CAD and decreased LVEF PTCA or medical management an alternative in patients with 3-vessel CAD, mild symptoms, and preserved LVEF
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