# RF catheter ablation of AVNRT in a patient with interrupted inferior vena cava anomaly with hemiazygos continuity with persistent left superior vena cava

## TL;DR

A rare case of a patient with an unusual vein structure and heart rhythm disorder was successfully treated with a specialized procedure.

## Contribution

Presentation of a rare anatomical anomaly and successful RF catheter ablation approach through left subclavian vein access.

## Key findings

- Intrahepatic IVC interruption with hemiazygos continuity and persistent LSVC is a rare anatomical anomaly.
- RF catheter ablation for AVNRT was successfully performed via left subclavian vein access in this case.
- The case highlights the importance of recognizing rare vascular anomalies during cardiac procedures.

## Abstract

Intrahepatic interruption of the inferior vena cava (IVC) with continued hemizygous is a very rare abnormality and sometimes it may be accompanied by other cardiovascular abnormalities. Continuation of the hemizygous vein draining into the right atrium through the left superior vena cava (LSVC) is much rarer. In this paper, we have presented a patient who had simultaneous IVC interrupted with persistent LSVC and suffered from Atrioventricular nodal reentrant tachycardia (AVNRT). Finally, radiofrequencies (RF) catheter ablation for AVNRT was successfully performed through a left subclavian vein access.