Direct transthoracic access to the left ventricle for catheter ablation of ventricular tachycardia.

Background: Percutaneous approaches for radiofrequency ablation of ventricular tachycardia (VT) in the left ventricle are typically transarterial retro-aortic, antegrade transmitral via an interatrial septal puncture, or epicardial. However, all 3 approaches may be contraindicated in certain cases. We describe 2 cases of VT ablation in which aortic and mitral valve replacements did not permit utilization of any of these techniques.

Methods And Results: Direct access to the left ventricular cavity was achieved with a percutaneous puncture through the intercostal space overlying the apex in the first case and through a left minithoracotomy in the second. A sheath was then inserted via the Seldinger technique, allowing catheter access for mapping and ablation of the VT. After successful ablation, the sheaths were withdrawn and hemostasis was achieved. A large left hemothorax occurred from the left ventricular apical puncture in the first case. Direct closure with a purse-string suture in the second case achieved hemostasis.

Conclusions: Direct percutaneous left ventricular puncture is a viable option for mapping and ablation of left ventricular VT. A minithoracotomy allows better hemostatic control. This technique has a role when other percutaneous approaches are contraindicated.