Application of Tissue Doppler Imaging Technique in Evaluating Early Ventricular Contraction Associated with Accessory Atrioventricular Pathways in Wolff- Parkinson-White Syndrome

Abstract

Our study was conducted on 20 patients with overt Wolff Parkinson white syndrome, they were examined by color coded TDI before and after radiofrequency ablation aiming to determine the feasibility of a TDI technique for evaluating the early contraction sites.

We were able to demonstrate the early contraction site in

16 patients with overall sensitivity of 80%, 100% sensitivity for left side APs, 100% sensitivity for septal Pathways, 20% for right sided APs which evaluation was more complex because of the view and the small group that used in the study (5 patients).

The TDI study post ablation proved disappearance of site of early activation by TDI in cases with successful ablation, only remnants were found in some cases. Still the area of early contraction remained in site in cases of failed ablation.