Study population
A total of 2768 patients (mean age 49.07±17.40 years) were referred for
RFCA for symptomatic VAs in our center from December 2009 to December
2019. Among them, 123 consecutive VAs were confirmed arising from the
DGCV-AIV based on systemic mapping results or successful ablation sites,
and enrolled in this retrospective study. All patients had a normal ECG
during sinus rhythm. Complete physical examination, echocardiography,
exercise stress testing, or coronary angiography proved no structural
heart diseases in any patient. Ethical approval was obtained from the
hospital’s ethics committee, and all patients gave written informed
consent before operation.