11 At what point in the ECG would you expect the ventricular

11.   At what point in the ECG would you expect the ventricular volume to be the greatest? Please explain your reply.
A    Just before the QRS complex  
B    Just before the P wave
C    Just after the P wave  
D    Just after the T wave

Solution

The ventricular volume is the greatest during the end diastolic volume . It can be defined as the volume of blood in the left or the right ventricle towards the end of diastole , or just before the beginning of systole. The ventricular contractions are shown by the QRS complex . Thus , the end diastolic volume would be highest just before this peak occurs .

Answer - A , just before the QRS. complex

As the QRS peak represents the depolarisation of the ventricles .