Related Experiment Video
Updated: Aug 18, 2026
Three-Dimensional Echocardiographic Method for the Visualization and Assessment of Specific Parameters of the Pulmonary Veins
Published on: October 28, 2020
Favorable effect of pulmonic vein isolation by partial circumferential ablation on ostial flow velocity
Sanjay Dixit1, Jian-Fang Ren, David J Callans
1Cardiovascular Medicine Division, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania, USA. Sanjay.Dixit@uphs.upenn.edu
Objectives:
The aim of this study was to determine the effect of electrical isolation of pulmonic vein (PV) on flow velocity.
Background:
We report our experience with electrical isolation of PV by partial circumferential ablation and its effect on ostial peak flow velocity as assessed by phased-array ultrasound catheter imaging.
Methods:
Sixty-two patients participated in the study. Magnetic electroanatomic mapping, ultrasound catheter imaging, and Lasso mapping catheter were used. Electrical isolation was achieved by delivering radiofrequency ablation (RFA) lesions proximal to Lasso mapping catheter bipoles showing PV entry. Following this, the number of RFA lesions/PV and their segment-wise distribution (maximum 4/PV) were assessed.
Results:
Fifty right superior, 51 left superior, 32 left inferior, and 17 right inferior PVs were isolated. RFA involved 4 segments in 42 PVs, 3 segments in 61 PVs, and 90% reduction in AF burden, either with or without previously ineffective antiarrhythmic agents, was achieved in 54 patients (87%).
Conclusions:
In the majority of PVs (72%), electrical isolation can be achieved by partial circumferential ablation (targeting
