2.2 Assessment of LV function
Two-dimensional echocardiography was performed before catheter ablation
and then at 3 ~ 6 months after the procedure.
Echocardiograms were performed by experienced ultrasonographers. A
standard imaging protocol was used based on apical 4-chamber views
according to the recommendations of the American Society of
Echocardiography Two independent observers analyzed
echocardiograms.17 Three cycles were measured for each
assessment, avoiding post-ectopic beats, and the average volumes were
obtained.