| Major |
| Unstable coronary syndromes |
| Acute or recent* MI with evidence of important ischemic risk by clinical symptoms or noninvasive study |
| Unstable or severe† angina (Canadian class III or IV‡) |
| Decompensated heart failure |
| Significant arrhythmias |
| High-grade atrioventricular block |
| Symptomatic ventricular arrhythmias in the presence of underlying heart disease |
| Supraventricular arrhythmias with uncontrolled ventricular rate |
| Severe valvular disease |
| Intermediate |
| Mild angina pectoris (Canadian class I or II‡) |
| Previous MI by history or pathologic Q waves |
| Compensated or prior heart failure |
| Diabetes mellitus (particularly insulin-dependent) |
| Renal insufficiency |
| Minor |
| Advanced age (older than 75 years) |
| Abnormal electrocardiography results (e.g., left ventricularhypertrophy, left bundle branch block, ST-T abnormalities) |
| Rhythm other than sinus (e.g., atrial fibrillation) |
| Low functional capacity (e.g., inability to climb one flightof stairs with a bag of groceries) |
| History of stroke |
| Uncontrolled systemic hypertension |