The normal PR interval on an electrocardiogram (ECG or EKG) typically ranges from 120 to 200 milliseconds (0.12 to 0.20 seconds). This interval represents the time it takes for electrical impulses to travel from the atria to the ventricles, specifically from the beginning of atrial depolarization to the beginning of ventricular depolarization. A PR interval outside this range can indicate underlying cardiac issues, such as a first-degree atrioventricular (AV) block if it is prolonged, or pre-excitation syndromes if it is shortened.
What is normal PR interval?
1 answer
2 answers