Question

Normal interval time for the PR interval is:

A) 0.04-0.12 second.

B) 0.33-0.42 second.

C) 0.12-0.20 second.

D) 1.20-2.00 seconds.

Answer 1

Answer: The normal interval time for the PR interval is C) 0.12-0.20 seconds.

Step-by-step explanation:

The normal interval time for the PR interval is C) 0.12-0.20 seconds.

The PR interval is a segment of an electrocardiogram (ECG) that represents the conduction time from the atria to the heart's ventricles. It is measured from the P wave's beginning to the QRS complex's beginning.

The duration of the PR interval can vary depending on factors such as heart rate and individual differences. However, in a normal healthy adult, the typical duration of the PR interval falls within the range of 0.12 to 0.20 seconds

Answer 2

The normal interval time for the PR interval is A) 0.04-0.12 second. It measures the duration from the beginning of atrial depolarization to the initiation of the QRS complex. Any delay in the impulse passage from the SA node to the AV node can be seen in the PR interval.

Step-by-step explanation:

The normal interval time for the PR interval is A) 0.04-0.12 second. The PR interval measures the duration from the beginning of atrial depolarization (the P wave) to the initiation of the QRS complex. It is clinically relevant as it can indicate any delay in the passage of the impulse from the SA node to the AV node. If there is a delay, it would be visible in the PR interval.