What electrical event in the cardiac cycle corresponds to the T wave on an ECG?
Answer and explanation
Correct answer: B. Ventricular repolarization
- Step 1: Following mechanical contraction, ventricular myocytes restore their resting membrane potential. Step 2. The T wave represents ventricular repolarization; upright and asymmetric in normal chest leads. Answer: Ventricular repolarization. Why not the others: Ventricular depolarization is QRS; Atrial depolarization is P wave; Atrial contraction is a mechanical event triggered by P wave.
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