Normal T-waves

Patient

Young man 22 years of age, asymptomatic, with no prior history and a normal cardiac ultrasound;

Trace

This ECG is normal; the T-wave is normal in all leads in terms of polarity (positive in all leads except for aVR and V1), amplitude (no frontal lead with an amplitude > 5mm or precordial lead with an amplitude > 10 mm) and morphology (asymmetrical pattern, rounded and regular shape);

Exergue

The normal T-wave is asymmetrical, of low voltage and positive in all leads except aVR and occasionally V1. The appearance of negative and symmetrical T-waves and of positive, symmetrical and tall T-waves is therefore abnormal and suspicious.