Cardiac ablation

Location of catheters for pulmonary vein isolation catheters

Cardiac ablation is a procedure that scars tissue in your heart to block abnormal electrical signals. It's used to restore a normal heart rhythm. Long flexible tubes (catheters) are threaded through blood vessels to your heart. Sensors on the tips of the catheters use heat or cold energy to destroy (ablate) the tissue. This illustration shows a type of cardiac ablation called pulmonary vein isolation.