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Question

In a man, artificial pacemaker is implanted due to defects in:

A
SA node
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B
SV node
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C
Mitral valve
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D
Purkinje fibres
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Solution

The correct option is A SA node
  • Pacemaker serves to produce rhythmic impulses for the heartbeat.
  • The sinoatrial node (SA) node serves as a pacemaker and is a small mass of specialized cardiac muscle. It is present in the posterior wall of the right atrium near the opening of the superior vena cava.
  • When the natural pacemaker is defective, the heartbeat may be too fast, too slow or irregular.
  • Artificial pacemakers are electronic devices that stimulate the heart with electrical impulses to maintain or restore a normal rhythm in people with irregular heart rhythms.
  • An artificial pacemaker provides an electrical impulse (discharge) that can stimulate the heart, thus restoring or maintaining a regular heartbeat.
So, the correct answer is option A.

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