A cardiac catheter ablation is a procedure performed to correct abnormal heart rhythms (arrhythmias). Under local anesthesia and intravenous sedation (or general anesthesia), the physician inserts flexible, insulated catheters through blood vessels (typically the femoral vein at the groin) and advances them to the heart using fluoroscopy (X-rays) and 3D mapping systems. A diagnostic electrophysiology (EP) study is performed first to trigger and map the abnormal electrical pathways. Once the target tissue is identified, the physician uses the ablation catheter to deliver energy (either heat via radiofrequency energy or cold via cryotherapy) to create tiny scars in the heart tissue. These scars block the abnormal electrical signals causing the arrhythmia. The procedure typically takes 2 to 4 hours.
Material Risks and Potential Complications
Bleeding or infection at the vascular access site, which may lead to hematoma, bruising, local infection, or vascular injury.
Damage to blood vessels used for catheter insertion, including dissection, pseudoaneurysm, or arteriovenous fistula requiring surgical correction.
Heart puncture (cardiac perforation) causing blood leakage into the sac surrounding the heart (cardiac tamponade), which is a life-threatening emergency requiring drainage with a needle or urgent surgery.
Damage to the heart's normal electrical conduction system, which may cause complete heart block requiring permanent pacemaker implantation.
Stroke or transient ischemic attack (TIA) due to blood clot formation on the catheters or displaced plaque (approximately 0.5 to 1 percent risk).
Pulmonary vein stenosis (narrowing of the veins carrying blood from the lungs to the heart) if ablation is performed near the vein openings.
Phrenic nerve injury, causing temporary or permanent diaphragm paralysis, particularly during cryoablation for atrial fibrillation.
Atrioesophageal fistula, which is a rare but highly dangerous connection between the atrium and the esophagus, occurring in less than 0.1 percent of cases.
Death: overall risk of procedural mortality is less than 0.1 percent, but may be higher depending on baseline cardiac conditions.
Reasonable Alternatives to Ablation
Antiarrhythmic medication therapy: daily medications to suppress abnormal rhythms, which require ongoing monitoring and may have side effects.
Electrical cardioversion: a scheduled procedure that delivers an electrical shock to reset the heart's rhythm, though it does not prevent recurrence.
Watchful waiting / no treatment: monitoring the condition while accepting the symptoms, risk of stroke (particularly in AFib), and heart muscle weakening.
Expected Benefits
The primary expected benefit of catheter ablation is the long-term control or elimination of abnormal heart rhythms, which is anticipated to resolve or significantly improve symptoms such as palpitations, shortness of breath, fatigue, chest discomfort, and lightheadedness. For some patients, successful ablation may eliminate the need for antiarrhythmic medications and reduce the risk of hospitalization.
Questions and Understanding Confirmation
I confirm that I have had the opportunity to read this consent form carefully and ask questions of my electrophysiologist. All my questions have been answered to my satisfaction. I believe I am making an informed and voluntary decision.