Atrial fibrillations can be caused by a small section of abnormal tissue in the heart. In these instances, catheter radiofrequency ablation can be used to destroy the abnormal tissue. In this procedure, a catheter (a thin, flexible tube) is used to guide tiny electrodes into the heart. When the damaged tissue is located inside the heart, a burst of radiofrequency energy destroys the tissue that is causing the abnormal electrical signals. With the damaged tissue destroyed, the heart usually returns to a normal rhythm.
Pulmonary vein isolation ablation (PVI ablation or PVA)
This procedure electrically isolates "hot spots" in the pulmonary veins that trigger atrial fibrillations. Pulmonary vein isolation eliminates atrial fibrillation in 60 to 80 percent of patients who are treated. In addition, medications that did not help patients prior to ablation are often effective.