The time lag from the onset of atrial depolarization to the onset of ventricular systole in ECG is called as

The time lag from the onset of atrial depolarization to the onset of v

1.	The time lag from the onset of atrial depolarization to the onset of ventricular systole in ECG is called as
A.	PR interval
B.	QRS complex
C.	ST segment
D.	T wave
Answer» B. QRS complex