Question

Which of the following waves of an ECG pattern is/are correctly described?

A. P wave-depolarization of atria
B. QRS complex-repolarization of ventricles
C. T wave-depolarization of ventricles
D. QRST complex-depolarization of ventricles

Answer 1

The P wave represents depolarization of the atria, the QRS complex represents depolarization of the ventricles, and the T wave represents repolarization of the ventricles. Atrial repolarization is not visible on an ECG.

Step-by-step explanation:

The correct descriptions of the waves of an ECG pattern are as follows:

1. P wave: Depolarization of the atria.
2. QRS complex: Depolarization of the ventricles.
3. T wave: Repolarization of the ventricles.

Atrial repolarization is masked by ventricular depolarization, so it does not have its own distinct wave on an ECG.