Introduction
SVT is a term for several fast heart rhythms that start above the ventricles. When episodes are recurrent or disruptive, catheter ablation may offer a way to treat the rhythm directly rather than relying on long-term medication.
Should I consider ablation for SVT?
The decision depends on the type of SVT, how often episodes occur, their impact on your life, any response to medication and your preferences. Observation can be appropriate for infrequent, mild episodes; medication is another option. For many common SVTs, ablation can be a potentially curative treatment.
What is an electrophysiology study?
An electrophysiology study uses thin catheters introduced through a vein—usually at the top of the leg—to record the heart’s electrical signals. It can identify the circuit responsible for the tachycardia and, where appropriate, allows ablation to be performed during the same procedure.
Common SVT mechanisms
Two common re-entry rhythms are AVNRT and AVRT. AVNRT involves an additional electrical circuit close to the heart’s normal electrical connection between the upper and lower chambers. AVRT uses an accessory pathway, an extra electrical connection present from birth. The exact mechanism matters because it guides the individual procedure and discussion of benefit and risk.
Medication or ablation?
Medication may reduce episodes for some people, while ablation aims to treat the electrical circuit itself. Neither approach is automatically right for everyone. A consultation can help you compare the likely benefit, practical implications and risks in your own circumstances.
What if I do not have an ECG from an episode?
An ECG or rhythm recording during symptoms is useful, but its absence does not always prevent assessment. A careful account of the episodes, previous ECGs and monitoring results can guide whether further rhythm monitoring or an electrophysiology opinion would be helpful.
Recovery and follow-up
The planned approach, anaesthetic or sedation, recovery and follow-up depend on the suspected rhythm and individual circumstances. You will receive specific advice about medication, activity, driving and when to contact the clinic after the procedure.