Gender Difference in Idiopathic Right Ventricular Outflow Tract-Ventricular Tachycardia.
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 ± 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 of onset, 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 ± 19.4 ms vs. 88.4 ± 20.7 ms, p = 0.02). Female patients had lower right ventricular mean voltage (3.0 ± 0.7 mV vs. 3.7 ± 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.


BACKGROUND
Gender; Right ventricular outflow tract-ventricular tachycardia.
Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital;
Jo-Nan
JN
Liao
Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital; ; Institute of Clinical Medicine, and Cardiovascular Research Institute, National Yang-Ming University;
Yu-Feng
YF
Hu
Division of Cardiology, Department of Internal Medicine, National Defense Medical Center and Tri-Service General Hospital, Taipei, Taiwan.
Wei-Shiang
WS
Lin
Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital; ; Institute of Clinical Medicine, and Cardiovascular Research Institute, National Yang-Ming University;
Yenn-Jiang
YJ
Lin
Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital; ; Institute of Clinical Medicine, and Cardiovascular Research Institute, National Yang-Ming University;
Shih-Lin
SL
Chang
Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital; ; Institute of Clinical Medicine, and Cardiovascular Research Institute, National Yang-Ming University;
Li-Wei
LW
Lo
Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital; ; Institute of Clinical Medicine, and Cardiovascular Research Institute, National Yang-Ming University;
Ta-Chuan
TC
Duan
Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital;
Fa-Po
FP
Chung
Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital;
Cheng-Hung
CH
Li
Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital;
Tze-Fan
TF
Chao
Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital;
Beny
B
Hartono
Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital; ; Institute of Clinical Medicine, and Cardiovascular Research Institute, National Yang-Ming University;
Shih-Ann
SA
Chen