Safety of an improved patent ductus arteriosus occluder for transcatheter closure of perimembranous ventricular septal defects with abnormally attached tricuspid chordae tendineae

Table 1 Baseline characteristics and transthoracic echocardiography data of patients

Patients, n	20
Sex (M/F), n (%)	11 (55)/9 (45)
Age, yr, mean ± SD	20.7 ± 12.3
Weight, kg, mean ± SD	50.1 ± 17.5
Chest radiography
Cardiomegaly, n (%)	8 (40.0)
Increased vascularity, n (%)	16 (80.0)
Echocardiography
Defect size on LV side, mm, mean ± SD	7.3 ± 1.5
Defect size on RV side, mm, mean ± SD	3.9 ± 0.8
MVSA, n (%)	5 (25.0)
Ventricular septal rim below the aortic valve, mm, median (IQR)	4.0 (1.4)
Attachment point of the tricuspid chordae tendineae to the defect on RV side, mm, median (IQR)	1.8 (0.5)
Minor AR, n (%)	1 (5.0)
Minor TR, n (%)	1 (5.0)
Follow-up, yr, mean ± SD	2.4 ± 1.0

M: Male; F: Female; SD: Standard deviation; LV: Left ventricular; RV: Right ventricular; MVSA: Membranous ventricular septal aneurysm; IQR: Interquartile range; AR: Aortic regurgitation; TR: Tricuspid regurgitation.