What is indicated by a P-R interval of .24?
A)An enlarged heart
B)A myocardial infarction
C)Heart block
D)Bundle branch block

Question

Quizplus · Accepted Answer

A P-R interval of .24 indicates a delay in the conduction of the electrical impulses from the atria to the ventricles, which is characteristic of heart block. An enlarged heart or myocardial infarction may cause changes in the electrical activity of the heart, but not necessarily a prolonged P-R interval. Bundle branch block may also cause changes in the electrical activity, but this would be seen as a widened QRS complex, not a prolonged P-R interval.

What Is Indicated by a P-R Interval of