In pacemaker terminology, what does sensing intrinsic beat mean?

In pacemaker terminology, what does sensing intrinsic beat mean?

• A. Detecting the heart's own beat
• B. Delivering an impulse to the heart
• C. Storing diagnostic data
• D. Regulating rate

Answer: (A)

Sensing intrinsic beat means the pacemaker detects the heart’s own electrical activity. The device monitors the heart through its leads and knows when a natural depolarization (P or QRS complex) occurs. When it senses an intrinsic beat, it can withhold pacing for that cycle, operating in a demand mode rather than continuously delivering impulses. This keeps pacing in step with the heart, protects against pacing when it isn’t needed, and helps conserve battery life. This concept is about observation of the heart’s activity, not delivering a stimulus, storing data, or directly setting the pacing rate—the latter adjustments are guided by what the device senses.

Sensing intrinsic beat means the pacemaker detects the heart’s own electrical activity. The device monitors the heart through its leads and knows when a natural depolarization (P or QRS complex) occurs. When it senses an intrinsic beat, it can withhold pacing for that cycle, operating in a demand mode rather than continuously delivering impulses. This keeps pacing in step with the heart, protects against pacing when it isn’t needed, and helps conserve battery life. This concept is about observation of the heart’s activity, not delivering a stimulus, storing data, or directly setting the pacing rate—the latter adjustments are guided by what the device senses.