Table 1

Location of the ventricular septal defect as described in the preoperative investigation

Location n TTE Invasive study TTE and invasive study
Perimembranous221 (85%)1084172
 With extension to the inflow septum11407
 With extension to the outflow septum10166035
 Extension not specified109384130
Gerbode defect1 (0.4%)010
Muscular25 (10%)7612
 Not specified12345
Location not specified13 (5%)382
Multiple defects in the ventricular septum15 (5.5%)735
  • One ventricular septal defect was found at primary surgery for mitral regurgitation and one at surgery for aneurysm of the sinus of Valsalva with leakage to the right ventricle (these are not included in the table) (n = 275). TTE, transthoracic echocardiography.