Which device routinely sends electronic pulses to maintain the heart's rhythm?

Which device routinely sends electronic pulses to maintain the heart's rhythm?

• A. Defibrillator
• B. ECG
• C. Electronic pacemaker
• D. Stent

Answer: (C)

The key idea is how the heart’s rhythm is kept steady with electrical support. An electronic pacemaker sits under the skin and sends small, controlled electrical pulses to the heart to trigger contractions on a regular schedule. This ongoing stimulation maintains a steady heart rate when natural pacing or conduction is too slow or faulty. A defibrillator’s job is to deliver a big shock to reset a dangerously fast or chaotic rhythm, not to provide routine pacing. An ECG records the heart’s electrical activity, it does not stimulate. A stent is a tube placed in a narrowed artery to keep blood flowing, with no role in pacing the heart’s rhythm.

The key idea is how the heart’s rhythm is kept steady with electrical support. An electronic pacemaker sits under the skin and sends small, controlled electrical pulses to the heart to trigger contractions on a regular schedule. This ongoing stimulation maintains a steady heart rate when natural pacing or conduction is too slow or faulty.

A defibrillator’s job is to deliver a big shock to reset a dangerously fast or chaotic rhythm, not to provide routine pacing. An ECG records the heart’s electrical activity, it does not stimulate. A stent is a tube placed in a narrowed artery to keep blood flowing, with no role in pacing the heart’s rhythm.