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Pacemakers
About Pacemakers
Patients with very slow heart rhythms, bradycardias, may need to have a permanent pacemaker inserted. The main reasons a pacemaker would be required are:
  1. Blocked or injured areas in the conduction system caused by normal aging or following an ablation.


  2. A combination of fast and slow heart rates requiring medications to control the fast rhythms and a pacemaker to prevent the slow rhythms.


How Pacemakers Work
The pacemaker system performs two functions: pacing and sensing.

Pacing
An electrical stimulus comes from the generator and travels down the lead to stimulate the heart muscle, causing the heart to contract. The pacemaker is set for a certain heart rate--for example, 70 beats/minute (bpm).

Sensing
The lead not only delivers an electrical stimulus to the heart muscle, but it also senses or "sees" your heart's own natural activity and does not pace if your heartbeat is faster than the programmed rate of the pacemaker.

If you need a pacemaker, your doctor will explain the causes of your rhythm disturbance and why it is necessary. You will then be asked to sign a consent form.

Your physician will discuss the particular type of pacemaker best suited to your needs.
Anatomy & Physiology Anatomy & Physiology
Cardiac Contractility Cardiac Contractility
Coronary Circulation Coronary Circulation
Electrophysiology Electrophysiology
Non-Invasive Cardiology Non-Invasive Cardiology
Pacemakers Pacemakers


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