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Pacemaker

A surgically implanted electronic device that monitors and regulates the heart's electrical rhythm by delivering controlled electrical impulses.

Key Facts

The device consists of a pulse generator and specialized pacing leads that transmit signals directly to the heart muscle.
Veterinary units are typically repurposed human devices past their clinical shelf life, significantly reducing implantation costs.
Leads are usually threaded through the jugular vein into the heart, with the generator placed in a subcutaneous neck pocket.
Post-operative adjustments are necessary to optimize battery longevity and ensure adequate myocardial stimulation.

The device provides consistent electrical stimulation to maintain a physiologically appropriate heart rate.

Pacemakers bypass the conduction block to restore normal ventricular activation and heart rate.

Pacemakers replace the malfunctioning sinoatrial node to maintain a stable cardiac rhythm.

Restoring consistent electrical pacing prevents the sudden drops in cardiac output that cause fainting.