View Heart Diagram With Pacemaker Background. A pacemaker is a small device that's placed in the chest or abdomen to help control abnormal heart rhythms. The rate at which these impulses fire, controls the rate of cardiac contraction, that is, the heart rate.
Other topics in this chapter. The device is implanted just under the skin, with a wire. The american heart association explains artificial pacemakers used for arrhythmias.
All the chambers work in a perfectly coordinated manner for the successful the tertiary pacemaker acts as the 3rd line of defense against the failure of the impulse to reach the lower chambers of the heart.
Alternatively, epicardial leads can be implanted surgically. The american heart association explains artificial pacemakers used for arrhythmias. Arrhythmias are problems with the rate or rhythm of the heartbeat. Usually initiates an asynchronous pacing.