NURSING ANM AND GNM

Detailed explanation-1: -This length between the P wave and QRS complex is represented by the PR interval, which is the time between the onset of atrial depolarization and the onset of ventricular depolarization. Physiology. The P wave represents the electrical depolarization of the atria.

Detailed explanation-2: -A lack of visible P waves preceding QRS complexes suggests a lack of sinus beats; this may occur with sinus dysfunction or in the presence of fibrillation or flutter waves.