Question

Describe in detail heart sound with suitable examples.

Answer 1

heart sound is caused by

• artioventicular valve
• semilunar valves

Answer 2

Answer :-

■ The sounds produced by the heart while pumping blood, are known as "Heart sounds".

■ There are 4 types of heart sounds, designated as :-

• S1

• S2

• S3

• S4

■ The first sound is known as "Lubb" (S1), is a long and loud sound, created by the closure of the artrioventricular valves (Tricuspid and Bicuspid) at the begining of the ventricular systole.

■ The second sound is known as "Dupp" (S2), is a short and sharp sound, created by the closure of the semilunar valves towards the begining of the ventricular diastole (End of the ventricular systole).

■ The sounds "S3" and "S4" may not be audible, but they are usually very faint. These sounds are associated with rapid ventricular filling and Atrial systole.

■ The heart sounds provide valuable information about the working of the valves of the heart.

■ The "Murmur" of the heart is an abnormal sound, which is produced due to the improper functioning of the valves of the heart, resulting in "Stenosis" or "Incompetence".

■ The technique of listening to the heart sounds, is called "Auscultation".