Heart Rhythm Disorders - University of Minnesota Physicians Heart at Fairview


Pacemakers benefit you if you suffer sinus node dysfunction or atrioventricular conduction (AV) block, two different forms of arrhythmia. The symptoms for both conditions are the same: fatigue, breathing difficulty, dizziness or fainting.

A pacemaker is a small, implantable electronic device that delivers electrical impulses to the heart muscle to initiate the heartbeat. When the natural electric system of the heart fails to initiate or pass electrical signals properly, a pacemaker can help.

A pacemaker increases the heart rate according to your activity level but does not strengthen the contraction of the heart muscle. The pacemaker can improve the efficiency of the heart’s pumping function by properly timing the contraction sequence of the atrium (upper) and the ventricle (lower) heart chambers.

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