Dicrotic notch is due to ?: (A) AV valve closure, (B) Mitral valve closure, (C) Pulmonary valve closure, (D) Tricuspid valve closure
Answer is A. dicrotic notch. : a secondary upstroke in the descending pa of a pulse tracing corresponding to the transient increase in aoic pressure upon closure of the aoic valve. -- called also dicrotic wave Ref Davidson 23rd edition pg 430