Short-term outcomes of transcatheter perimembranous ventricular septal defect closure using the konar-multifunctional...

Transcatheter device closure of perimembranous ventricular septal defect (PmVSD) using the Lifetech KONAR-MF ventricular septal defect occluder (MFO) presents a promising and effective alternative to surgical repair.

This study aims to evaluate the 6-month safety and efficacy of the MFO device for PmVSD closure.

We conducted a retrospective analysis of clinical data from patients who underwent percutaneous PmVSD closure using the MFO device at our institution between December 2021 and June 2024. Safety, procedural and 6-month outcomes were systematically assessed.

A total of 115 patients (52.2% male) underwent transcatheter PmVSD closure. The median age was 7.6 years [interquartile range (IQR), 4.0-27.2] and weight 25.6 kg (IQR, 14.2-62.6). Median defect size by angiography was 5.7 mm (IQR, 3.8-8.3) on the left ventricle side and 3.3 mm (IQR, 2.3-4.4) on the right ventricle side. Aortic valve prolapse (AVP) was noted in 114 patients (99.1%), with pre-procedural aortic regurgitation (AR) in 36 (31.3%). Median pulmonary artery pressure was 17 mmHg (IQR, 14-20); 48 (41.7%) had Qp/Qs >1.5. All procedures were successful; 33 (28.7%) used a retrograde approach. Median fluoroscopy time was 22 min (IQR, 15-33). Complete closure was achieved in 51.3% at 1 day, 62.6% at 1 month, 69.6% at 3 months, and 83.5% at 6 months. Transient conduction disturbances (n = 4), hypotension (n = 1), and femoral hematoma (n = 1) were observed. No cases of endocarditis, valve injury, or complete atrioventricular block occurred.

Transcatheter closure of PmVSD with the MFO demonstrated safety and efficacy during the 6-month follow-up period. Notably, the majority of defects in this cohort were small in size.