What is the normal value of the PR interval on an electrocardiogram (ECG)?
Disease description:
A relative of mine underwent a physical examination at the hospital, and the electrocardiogram (ECG) report indicated a shortened PR interval. What is the normal range for the PR interval on an ECG?
Doctor's answer (2)
Dr. Liu Shilei
Under normal circumstances, the PR interval on an electrocardiogram (ECG) ranges from 0.12 to 0.20 seconds. A shortened PR interval is primarily attributed to either a short atrioventricular (AV) node or the presence of an abnormal accessory pathway. The PR interval represents the time required for electrical conduction from the atria to the ventricles. In children, the PR interval is typically shorter, whereas in elderly individuals, it tends to be slightly prolonged.
