![]() ![]() Dual-chamber pacemakers have two leads.It will carry impulses from the pulse generator to an upper or lower chamber of the heart. Single-chamber pacemakers have one lead.These can be placed in different chambers of the heart, depending upon the patient's heart condition: More activity entails a faster target heart rate. Rate-responsive pacing is more popular simply because the target heart rate can change from moment to moment, based on your body movements and breathing. The signals speed up or slow down the heart based on breathing, blood temperature and other factors. Rate-responsive pacing: Electrical signals adjust to your activity level.Demand pacing: Electrical signals are transmitted to the heart only when it beats too slowly or skips a beat.If the computer detects a slow heart rate or an abnormal heart rhythm, the battery will deliver an electrical signal to the lead, causing the heart muscle to contract.Ī pacemaker can be adjusted to maintain normal heart rhythm in two main ways: A pacemaker also has a pulse generator consisting of a battery and a small computer that receives signals from the lead. It can maintain a suitable heart rate - based on a minimum rate - or prevent irregular heartbeats.Ī pacemaker may have one, two or three leads - long, thin wires directly connected to the heart to monitor heart rhythms. A pacemaker can be programmed to regulate the heart's upper chambers (atria), lower chambers (ventricles) or both. If you have fainting spells (syncope), heart failure and thickening of the heart walls (hypertrophic cardiomyopathy).Ī defibrillator is programmed by an electrophysiologist, a cardiac physician specializing in heart rhythms.If your heart beats too slowly (bradycardia) or does not properly conduct electrical impulses (a blockage in the electrical system, called heart block).Pacemaker implantation is typically recommended: ![]() ![]() A pacemaker is an electronic device that sends small electrical impulses to the heart to correct certain kinds of irregular heartbeats (arrhythmias). ![]()
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