Key result
Transcatheter dual Konar MFO closure completely abolishes aorta-to-RV shunt and normalizes hemodynamics.
Why the study?
An aorta-to-right ventricle tunnel is a rare, clinically challenging variant of aortoventricular tunnel that can cause high-output cardiac failure in pediatric patients.
Does transcatheter dual Konar MFO device closure eliminate shunt flow and normalize ventricular dimensions in a pediatric patient with a large aorta-to-right ventricle tunnel?
Case Report (n=1)
No
Does transcatheter dual Konar MFO device closure eliminate shunt flow and normalize ventricular dimensions in a pediatric patient with a large aorta-to-right ventricle tunnel?
Transcatheter dual-device occlusion using the Konar MFO device is a feasible, low-risk, and effective minimally invasive alternative to open-heart surgery for closing an aorta-to-right ventricle tunnel in appropriately selected anatomy.
Successful closure in one pediatric case supports device feasibility for rare tunnels; leaves open need for prospective trials on durability and selection.
An aortoventricular tunnel is a congenital structural defect characterized by an anomalous extracardiac channel that bypasses the normal valvular apparatus and connects the ascending aorta – at a level above the sinotubular junction – directly to a ventricular cavity. While communication with the left ventricle is the predominant form, the right ventricle (RV) may also serve as the terminal chamber, producing a hemodynamically distinct and clinically challenging variant. This RV form is a recognized – though uncommon – cause of high-output cardiac failure in pediatric patients. We present the diagnostic workup and successful transcatheter closure in a 12-year-old girl with an aorta-to-RV tunnel, demonstrating that percutaneous intervention using the Konar MFO (multifunctional occluder) device is a feasible and effective minimally invasive treatment strategy for this rare malformation.
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Gatram et al. (2026) conducted a case report in Aorta-to-right ventricle tunnel (AVT) (n=1). Transcatheter dual Konar MFO (multifunctional occluder) device closure was evaluated on Complete abolition of shunt flow and hemodynamic normalization. Transcatheter dual Konar MFO closure completely abolished the aorta-to-RV shunt, normalizing aortic pressure from 120/45 to 120/75 mmHg and reducing mean PA pressure from 21 to 15 mmHg.
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