ST Segments
Normal ST segment: at baseline (same level as the PR segment)
- Subtle ST segment elevation is frequently seen in V1-V3, especially in men; may be normal
- Diffuse ST elevation of 1 mm in the young is normal
- The ST segment is the smoothest segment in the ECG; all notches are suggestive of P waves
- The cause of ST elevation must always be evaluated in the clinical context
- In patients with chest pain, acute MI should always be considered first