**Question:** Dicrotic pulse is seen in: (Repeat)

A. Systolic murmur
B. Diastolic murmur
C. Pulsus paradoxus
D. Pulsus quaternus

**Correct Answer:** B. Diastolic murmur

**Core Concept:**
Dicrotic pulse is a clinical phenomenon characterized by the presence of two distinct peaks in the diastolic phase of the blood pressure waveform. These peaks are separated by a brief interval, known as the dicrotic notch. The first peak (P1) corresponds to the closure of the aortic valve, while the second peak (P2) represents the closing of the mitral valve.

**Why the Correct Answer is Right:**
In the diastolic phase of the blood pressure waveform, Dicrotic pulse is due to the closing of two valves: the aortic valve (P1) and the mitral valve (P2). The second peak corresponds to the closure of the mitral valve, which is typically observed later than the closure of the aortic valve. This separation of peaks results in the distinct and easily identifiable characteristic of a diastolic murmur.

**Why Each Wrong Option is Incorrect:**
A. Systolic murmur: A systolic murmur occurs during the systolic phase of the heartbeat, specifically corresponding to the closure of the mitral and tricuspid valves. Diastolic murmur, like dicrotic pulse, is not present in this phase.

C. Pulsus paradoxus: Pulsus paradoxus refers to a decrease in blood pressure and pulse amplitude during inspiration, typically seen in patients with pulmonary edema. It is not associated with the dicrotic pulse.

D. Pulsus quaternus: Pulsus quaternus is characterized by the presence of six peaks (P1, P2, P3, P4, P5, and P6) in the blood pressure waveform. Dicrotic pulse (P2) is not a part of this condition.

**Clinical Pearl:** The presence of a diastolic murmur (dicrotic pulse) indicates a heart condition affecting the left ventricle, such as hypertrophic cardiomyopathy or aortic stenosis. These conditions may alter the timing or severity of dicrotic pulse, providing valuable information about the affected cardiac chamber and valve.