PR interval in Figure 4 is closest to
A)0.12 seconds.
B)0.28 seconds.
C)0.04 seconds.
D)0.40 seconds.

Question

PR interval in Figure 4 is closest to 
A)0.12 seconds. 
B)0.28 seconds. 
C)0.04 seconds. 
D)0.40 seconds.

Quizplus · Accepted Answer

The PR interval is the time between the start of the P wave and the start of the QRS complex. In Figure 4, the PR interval appears to be approximately 3 small squares, which is equivalent to 0.12 seconds on the ECG paper. This is within the normal range of PR interval duration (0.12-0.20 seconds). Therefore, choice A) is the best choice.

PR Interval in Figure 4 Is Closest to