Which portion of the electrocardiogram (ECG)is most valuable in diagnosing atrioventricular (AV)conduction disturbances?
A) P wave
B) PR interval
C) QRS complex
D) QT interval

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 Electrocardiogram (ECG)is Most Valuable in Diagnosing