Question

Name the instrument used to measure heartbeat.

Answer 1

Hint: During every cardiac cycle, the two sounds lub and dub are produced due to the closure of tricuspid and semilunar valves respectively, which can be easily heard through the device stethoscope.

Complete step by step answer:
The stethoscope is a medical device used for listening to the internal sounds on humans and animals. It has a small disc like resonator that is placed against the skin, and one or two tubes connected to two earpieces. You can use it to listen to the sounds made by the heart, lungs or intestines, as well as blood flow in arteries and veins. You may have observed that it is used in combination with a manual sphygmomanometer when measuring blood pressure.

The heart can be considered as two pumps that propel blood through different circuits. The pumping of the heart or the heartbeat is caused by alternating contractions and relaxations made by heart muscles. These contractions and relaxations are responsible for the sound production in the heart. These sounds are lub and dub which are produced by the closing of the tricuspid valve and semilunar valve.

Note: Many medical conditions are caused due to the non-functionality of the myocardial walls which can be detected by the use of stethoscopes, like tachycardia, polycardia, arrhythmia etc.