Question

The nurse is assessing a patient's electrocardiogram (ECG). What phase does the nurse determine is the resting phase before the next depolarization?

Answer 1

The resting phase before the next depolarization on an ECG is referred to as ventricular diastole, which follows the T wave and lasts about 430 ms, allowing ventricular filling and relaxation before the next contraction.

Step-by-step explanation:

The resting phase before the next depolarization in an electrocardiogram (ECG) is known as ventricular diastole. During this phase, the ventricles are in a state of relaxation following the repolarization that is represented by the T wave in an ECG. This phase lasts approximately 430 ms and is crucial for the heart as it allows the ventricles to fill with blood, preparing for the subsequent contraction or systole. Ventricular diastole has two distinct phases and is part of the comprehensive cardiac cycle which is repeatedly visualized in ECG readings. Correct interpretation of these phases is paramount for nurses and other healthcare professionals in assessing cardiac function and diagnosing potential cardiac conditions.