Which portion of the ECG is most valuable in diagnosing atrioventricular (AV)conduction disturbances?

Question

Quizplus · Accepted Answer

The PR interval is an indicator of atrioventricular nodal function.The P wave represents atrial depolarization.The QRS complex represents ventricular depolarization, corresponding to phase 0 of the ventricular action potential.The QT interval is measured from the beginning of the QRS complex to the end of the T wave and indicates the total time interval from the onset of depolarization to the completion of repolarization.

Which Portion of the ECG Is Most Valuable in Diagnosing