Question

Begins during the latter part of the P wave refers to:

a. Atrial contraction.
b. Ventricular contraction.
c. Atrial relaxation.
d. Ventricular relaxation.

Answer 1

The correct answer is a) Atrial contraction it begins during the latter part of the P wave on an EKG.

Answer 2

The latter part of the P wave on an ECG indicates atrial relaxation, which is the correct response to the question being asked.

Step-by-step explanation:

The latter part of the P wave on an electrocardiogram (ECG) typically indicates atrial relaxation. In the cardiac cycle as represented by the ECG, the P wave corresponds to the depolarization (contraction) of the atria, which leads to atrial contraction. This contraction allows blood to flow from the atria into the ventricles.

The latter part of the P wave signifies the completion of atrial depolarization. Subsequently, the atria begin to relax (repolarize) in preparation for the next phase of the cardiac cycle. This relaxation phase is essential to allow the atria to refill with blood before the next contraction occurs, facilitating the efficient pumping of blood into the ventricles during the cardiac cycle.

Therefore, when the latter part of the P wave is observed on an ECG, it is indicative of atrial relaxation rather than ventricular contraction or relaxation, as the P wave primarily represents atrial depolarization and subsequent relaxation.