The dicrotic notch on the aoic pressure curve is caused by-: (A) Closure of the pulmonary valve, (B) Rapid filling of the left ventricle, (C) Closure of the aoic valve, (D) Contraction of the atria
Answer is C. dichrotic notch is a small dip in the graph of aoic pressure throughout the cardiaccycle corresponding to the closure of aoic valve Ref Harrison 20th edition pg 1445