- ST-segment elevation in lead aVR portends a worse prognosis in ACS and often predicts the need for CABG.
- Hyperacute T-waves are not necessarily tall, and small T-waves can still be hyperacute when paired with a low-amplitude QRS complex.
- The tall T-waves associated with hyperkalemia are sharp, pointy, symmetric, and have a narrow base.
- When in doubt, get serial ECGs (every 15 minutes) and use adjunctive information.
