ECG in Acute Pericarditis Vs Acute ST-Elevation MI
| ST-Segment Elevation | ECG Lead Involvement | Evolution of ST and T Waves | PR-Segment Deviation |
|---|---|---|---|
| Pericarditis | |||
| Concave upward | All leads involved except aVR and V1 | ST remains elevated for several days; after ST returns to baseline, T waves invert | Yes, in majority |
| Acute ST elevation MI | |||
| Convex upward | ST elevation over infarcted region only; reciprocal ST depression in opposite leads | In absence of successful reperfusion therapies: T waves invert within hours, while ST still elevated; followed by Q-wave development | No |