試題詳解

8. In an electrocardiogram (ECG), there are three major signals. The first one is called P wave, the second one is QRS complex, and the third one is T wave. Which part of the ECG represents the delay of the activation of the atrioventricular node?
(A) P wave
(B) Interval between P wave and QRS complex
(C) QRS complex
(D) Interval between QRS complex to T wave
(E) T wave