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Body Fluids and Circulation — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBody Fluids and Circulation3 Marks
Question
How can we say that artificial pacemaker is a life saving instrument?
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Answer

It is an electronic device, which regularly sends a small amount of electrical charge for maintaining the rhythmicity of the heart. It is implanted subcutaneously in the upper thoracic region having a connection with the heart.

The artificial pacemaker is called a life-saving instrument because, it stimulates the heart electrically at regular intervals to maintain its beats. Thus, it replaces the SA node as the originator of the cardiac impulse. It is to be noted that some pacemakers stimulate the heart at a fixed rate, others sense when the natural heart rate falls below a predetermined value and then stimulates the heart.

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