Absolute indications | Relative indications |
---|---|
1. Decrease in systolic blood pressure >10 mmHg from baseline, accompanied by evidence of ischemia | 1. Decrease in systolic blood pressure >10 mmHg from baseline, in the absence of evidence of ischemia |
2. Moderate to severe angina | 2. ST or QRS changes such as excessive ST-depression (>2 mm of horizontal or down-sloping ST-segment depression) or marked axis shift |
3. Increasing nervous system symptoms (ataxia, dizziness, or near-syncope) | Â |
4. Signs of poor perfusion (cyanosis or pallor) | 3. Arrhythmias other than sustained ventricular tachycardia, including multifocal PVCs, triplets of PVCs, supraventricular tachycardia, heart block, or bradyarrhythmias |
5. Technical difficulties in monitoring ECG or systolic blood pressure | Â |
6. Participant’s desire to stop | 4. Fatigue, shortness of breath, wheezing, leg cramps or claudication |
7. Sustained ventricular tachycardia | 5. Development of bundle-branch block or IVCD that cannot be distinguished from ventricular tachycardia |
8. ST elevation (≥ 1.0 mm) in leads without diagnostic Q-waves (other than V1or aVR) | 6. Increasing chest pain |
 | 7. Hypertensive responsea |