This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiomyopathies, Subject name: Medicine
What is the cause of dicrotic notch? 
Select and explain. 
A. Passive filling of blood in ventricles, B. Rapid ejection phase, C. Peripheral resistance, D. Isovolumic contraction
C: Peripheral resistance
Answer: C: Peripheral resistance 
Explanation: Dicrotic notch is seen in pulse tracing after closing of aoic valve. The peripheral resistance generates an abberation in tracing while the aoic valves are closing-->causing Dicrotic pulse.