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  • Title: Percutaneous closure of restrictive-type perimembranous ventricular septal defect using the new KONAR multifunctional occluder: Midterm outcomes of the first middle-eastern experience.
    Author: Haddad RN, Daou LS, Saliba ZS.
    Journal: Catheter Cardiovasc Interv; 2020 Sep 01; 96(3):E295-E302. PubMed ID: 31886940.
    Abstract:
    OBJECTIVES: To evaluate the safety, efficiency, and midterm outcomes of transcatheter perimembranous ventricular septal defect (pmVSD) closure using the new KONAR-MF™ VSD occluder. BACKGROUND: Off-label percutaneous pmVSD closure is a well-established procedure with promising results. Yet, interventionists are still searching for the ideal device. METHODS: Between June 2018 and March 2019, 20 patients with hemodynamically significant but restrictive-type pmVSD underwent an attempted transcatheter closure using the new KONAR-MF™. All implantations were performed retrogradely under general anesthesia, transoesophageal echocardiography, and fluoroscopic guidance. Prospective follow-up using transthoracic echocardiography and electrocardiogram was done until August 2019. RESULTS: The median age was 6.4 years (8 months to 43.4 years), and the median body weight was 17.3 (9-74) kg. The mean defect size on the left ventricular aspect was 11.7 ± 2.8 mm. All devices were successfully and rapidly implanted. One device embolized in the pulmonary artery, 24 hr after implantation and was percutaneously retrieved with no complication. Over a mean follow-up period of 8.2 ± 3.0 months, complete closure was achieved in 84.2% of patients. One new onset of mild aortic regurgitation was detected before discharge and remained stable. Tricuspid valve regurgitation, complete heart block, major complication, and death were not observed. CONCLUSIONS: Transcatheter pmVSD closure using the KONAR-MF™ can be successfully performed in adult and pediatric patients. It is a safe and promising device, designed to provide high conformability to septal defects with a lower risk of heart block. Retrograde implantation allows procedural flexibility, efficient deliverability, and control of valvular interferences.
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