Cardiac Ablation (EPS and Catheter Ablation)

Every heartbeat is driven by an electrical impulse that spreads through the heart in an orderly way. In rhythm disorders, or arrhythmias, this order breaks down: an extra circuit may create sudden racing episodes, as in supraventricular tachycardia, or chaotic signals, often starting around the pulmonary veins, may make the upper chambers quiver irregularly, as in atrial fibrillation. An electrophysiology study investigates this from the inside. Catheters positioned in the heart record its electrical activity, and the team can deliberately and safely provoke the abnormal rhythm to see exactly where it comes from. Ablation then treats the source: the tip of a catheter applies radiofrequency heat, or a cryoballoon applies freezing energy, to create tiny, precise scars that block the faulty electrical pathway while leaving the rest of the heart working normally. Diagnosis and treatment usually happen in the same session.

Ablation is considered when an arrhythmia causes troublesome symptoms such as palpitations, breathlessness, dizziness or fainting, when episodes keep returning despite rhythm medication, or when a person prefers a procedural solution to taking tablets for many years. For supraventricular tachycardia and atrial flutter it is often offered early, because the circuits are well defined and the treatment is commonly curative. For atrial fibrillation, ablation is usually recommended when the rhythm keeps breaking through medication or affects quality of life, and it tends to work best in the earlier, intermittent stage of the condition. Some fast rhythms from the lower chambers are also treated this way. The decision is made by an electrophysiologist after reviewing ECG recordings of the rhythm, heart imaging and general health, and after weighing the likely benefit against the alternatives of medication or simple monitoring.

The procedure takes place in an electrophysiology laboratory. Depending on the type of ablation and the centre's practice, it is done under sedation or general anaesthesia; atrial fibrillation ablation is often performed with the patient fully asleep. Catheters are inserted through a vein in the groin under local anaesthesia and guided into the heart using X-ray imaging and, in most modern laboratories, a three-dimensional electro-anatomical mapping system that builds a detailed model of the chambers while keeping radiation low. The team records signals, provokes and identifies the arrhythmia, and then applies radiofrequency heat or cryoablation to the target tissue; in atrial fibrillation this usually means electrically isolating the pulmonary veins. The catheters are then removed and the puncture sites are closed with pressure or small stitches. Most sessions take about two to four hours, and an overnight stay with heart-rhythm monitoring follows.

A suitable candidate has a documented arrhythmia, symptoms or risks that justify an invasive procedure, and a heart that has been assessed with an echocardiogram and, where needed, further imaging. Preparation includes ECG recordings that capture the abnormal rhythm, blood tests and a careful review of medicines; blood thinners and rhythm drugs are adjusted on medical advice, and for atrial fibrillation ablation anticoagulation is managed precisely around the procedure. For international patients, the assessment can begin from home, with rhythm recordings, imaging and a medical summary reviewed remotely so the electrophysiology team can confirm that ablation is appropriate and plan the type of procedure before travel. It helps to bring every available tracing of the arrhythmia, including smartwatch or event-monitor recordings, because documenting the rhythm is central to planning the ablation.

Recovery after catheter ablation is usually straightforward. Most people stay one night for rhythm monitoring and go home the next day, so a stay of one to two days is typical. There may be bruising at the groin puncture sites, and walking resumes within hours, while heavy lifting and strenuous exercise are avoided for about a week or as the team advises. Mild palpitations or short irregular runs in the weeks after an atrial fibrillation ablation are common while the treated tissue heals and do not necessarily mean the procedure has failed; the first months are considered a healing period. Air travel is normally possible within a few days, once the team confirms a settled recovery. Follow-up rhythm checks can usually be done from home with a local cardiologist or wearable recordings, and international patient teams commonly arrange interpreters, records in your language and remote reviews after your return.

Catheter ablation is a well-established treatment performed in large numbers worldwide, and serious complications are uncommon in experienced centres. Possible issues include bruising or bleeding at the puncture sites and, more rarely, fluid around the heart, damage to nearby structures, heart block needing a pacemaker, or stroke; the specific risks depend on the type of ablation and are explained in detail beforehand. Results vary by arrhythmia. For supraventricular tachycardia and typical atrial flutter, a single session is usually curative for most people. For atrial fibrillation, a single procedure controls the rhythm for many patients, and outcomes are generally better in the intermittent form, though a repeat session is sometimes needed to consolidate the result. Success also depends on overall health, so weight, blood pressure and sleep apnoea are treated alongside. Experienced, high-volume electrophysiology teams report the most consistent outcomes, which is why centre choice matters.