Outflow Tract Premature Ventricular Contractions and Ventricular Tachycardia The Typical and the Challenging

摘要

The ventricular outflow tracts are the most common sites of origin of idiopathic ventricular arrhythmias (VAs). Structural heart disease should be excluded because the outflow tract can be a source of VAs in early cardiomyopathies. Electrocardiogram of the VA is useful in predicting potential ablation sites but careful and sequential mapping of the various structures in the outflow tract is often essential to define sites for successful ablation. Ablation for VAs from the right ventricular outflow tract has the highest success, followed by sites in the aortic root, left ventricular (LV) endocardium, and LV epicardium. The LV summit is a difficult area to access and. if catheter ablation from surrounding areas proves unsuccessful, surgical ablation is an option.