The ‘A’ wave of venous pulsation in the neck is

A. True The pressure wave due to atrial contraction passes up freely into the neck.

B. False Atrial systole precedes the ventricular systole that generates the carotid pulse.

C. False It is absent – there is no effective atrial systole in atrial fibrillation.

D. True Right atrial contraction is more forceful to overcome valvular resistance.

E. True If the atrial and ventricular systoles coincide, the A and C waves merge to give a giant wave