Question

The 2nd Heart Sound (“dupp”) is caused by closing of the:

A. Rt AV & Pulmonary Valves

B. Rt AV & Aortic Valves

C. Pulmonary & Aortic Valves

D. Lt AV & Pulmonary Valves

E. Lt AV & Aortic Valves

F. Rt AV & Lt AV Valves

Answer 1

1. The 2 nd heart sound (dupp) is caused by the closing of the pulmonary and Aortic valves.

2. This closed at the end of the ventricular contraction or systole during the T wave of the ECG.

3. If anybody wants to listen the heart sound then it is heard from the surface of the chest. Two district sounds are heard from the heart which is known as lub which is first sound and dupp which is the second sound.

4. Lub sound is occur at the beginning of the ventricular contraction and dubb sound occur at the end of the ventricular contraction.