Background: Few studies have discussed gender differences in idiopathic right ventricular outflow tract-ventricular tachycardia (RVOT-VT). This study explored possible gender differences in electrophysiological characteristics and catheter ablation for idiopathic RVOT-VT in Taiwan.
Methods: Ninety-three patients (mean age 38.7 土 15.5years, 30 males) were diagnosed as having idiopathic RVOT-VT between 1998 and 2010, and were enrolled and analyzed as part of our investigation.
Results: The age ofonset, syncope episodes, underlying hypertension, diabetes mellitus, hyperlipidemia or family history of ventricular arrhythmias did not differ between males and females. Male patients had longer QRS width (99.9 土 19.4 msvs. 88.4 土 20.7 ms, p = 0.02). Female patients had lower rightventricular mean voltage (3.0 土0.7 mV vs. 3.7 土 0.9 mV, p = 0.03), and more low voltage zone over the right ventricular outflow tract free wall (27.0% vs. 6.7%, p = 0.02). Eighty-one patients received catheter ablation (23 males). The acute success rate, repeated catheter ablation rate and VT recurrence rate were similar between the genders.
Conclusions: Our study did reveal differences in electroanatomical characteristics by gender for patients who had idiopathic RVOT-VT, but overall outcomes after catheter ablation were similar.