Question

The nurse is participating in a class on rhythm strip interpretation. Which statement by the nurse indicates an understanding of a PR interval of 0.20?

1. "This is a normal finding."
2."This is indicative of atrial flutter." 3."This is indicative of atrial fibrillation." 4."This is indicative of impending reinfarction."

Answer 1

A PR interval of 0.20 is indicative of a normal finding.

Step-by-step explanation:

The PR interval on an electrocardiogram (ECG) represents the time it takes for the electrical impulse to travel from the atria to the ventricles. A normal PR interval typically ranges from 0.12 to 0.20 seconds. In this case, a PR interval of 0.20 falls within the normal range. This suggests that the electrical conduction through the heart's atrioventricular (AV) node is proceeding at an appropriate pace, allowing for coordinated contraction of the atria and ventricles.

The other options are incorrect interpretations. Atrial flutter and atrial fibrillation involve abnormal atrial rhythms, and impending reinfarction would be more related to changes in ST segments or T waves rather than the PR interval.