The Magic of Heart Sounds
The Magic of Heart Sounds
- The sounds produced by the heart during each heartbeat are called heart sounds.
- The heart produces two sounds, Which can be heard with the help of a stethoscope as lubb and dub or dup.
What is the advantage of a heartbeat?
First Sounds (lubb)
- The first sound is produced during ventricular contraction. It is known as a systolic sound. This sound is low, dull, and last longer. It is heard with a stethoscope as a club.
Second Sound (dub or dup)
- The second sound is produced at the beginning of ventricular relaxation or diastole. It is known as a diastolic sound. This sound is sharp and short. It is heard with a stethoscope as a dub or dups.
Third Sound (hiss)
- Normally heart does not produce any other sound than lubb and dub or dup., but in a certain abnormal condition, the heart produces a third sound known as murmurs. It is heard with a stethoscope as a hiss. The third sound is produced due to the leaking of the blood or incomplete closing of valves or vibrations.
Thus the heart sounds are denoted as lubb – dub or lubb – dub – hiss or lubb – hiss – dub.
