Dicrotic notch corresponds to?: (A) Closure of AV valves, (B) Closure of Aortic and pulmonic valves, (C) Opening of AV valves, (D) Opening of Aortic and pulmonic valves
Answer is B. Ans. (b) Closure of aortic and pulmonic valvesRef.: Ganottg 25th ed. 1540The Dicrotic notch is small oscillations on the falling phase of the pulse wave caused by vibrations set up when the aortic valve snaps shut.