Role of echocardiography in case selection in transcatheter closure of perimembranous ventricular septal defect using occluder / 中华超声影像学杂志

ABSTRACT

Objective To study the role of echocardiography in case selection in transcatheter closure of perimembranous ventricular septal defect (VSD) with occluder.Methods Transcatheter closure was conducted on 26 patients with perimembranous VSD. Occluders were made of China. The images were acquired with transthoracic echocardiography. Results Twenty four patients were implanted with occluders successfully. The VSD diameter by echocardiography was 4-10 mm, average was 6.4 mm.The implanted occluder device was 2 mm larger than VSD,the maximal one was 12 mm. Perimembranous VSDs were classified by subinfracristal ( 5 cases ),membranous(6 cases), submembranous (13 cases),and the minimum distance between VSD and aortic valve annulus was 2 mm,between VSD and tricuspid valve was 3 mm. Membranous VSD was easy to be occluded. Echocardiography immediately after placement showed no residual shunt in 21 patients. The one week follow up examination showed complete closures in 21 patients. Echocardiography immediately after placement showed mild residual shunts in 3 VSD, the residual shunt disappeared after one month in one patient, two patients had mild shunt. Two VSD abandoned the occlusion because of aortic valve regurgitation increasing. Conclusions Echocardiography plays an important role in case selection.