The time from the beginning of the P wave, indicating atrial depolarization, to the beginning of the QRS complex, representing ventricular depolarization, is the PR interval. This represents the ...

The PR segment is different from the PR interval, which is measured in units of time. Remember that segments are different than intervals. The important factor in analyzing segments on the ECG is ...

Prolongation of the PR interval by more than 200 ms, which signifies first-degree atrioventricular block, has been found to increase the risk of developing atrial fibrillation, the need for a ...