We report a rare case of a 3-month-old male infant with Down syndrome, severe pulmonary arterial hypertension (a large patent ductus arteriosus, an atrial septal defect, and a giant hepatic arteriovenous malformation). Initial treatment involved hepatic arteriovenous malformation embolisation using 17 Azur® CX Peripheral Coils, resulting in clinical improvement. However, persistent pulmonary arterial hypertension led to patent ductus arteriosus closure using an 8-mm Lifetech Cera™ vascular plug after a successful balloon occlusion test. Post-intervention, the patient showed symptomatic relief, reduced right ventricular overload, and atrial septal defect shunting shifted to left to right. This is the first reported paediatric case combining these features successfully managed through a multidisciplinary and stepwise treatment approach, eliminating the need for liver transplantation.

Coronary artery fistulas are rare cardiac anomalies, often asymptomatic and frequently discovered incidentally during routine cardiac imaging. Transcatheter closure with coil embolisation is increasingly recognised as a preferable alternative to surgical intervention due to its lower complication rates. In this report, we present three paediatric cases in which coronary artery fistulas were successfully embolised using the Azur® CX Peripheral Coil System. This system demonstrates low-profile suitability for occluding highly tortuous vessels in children, enabling controlled coil delivery via a microcatheter. Its hydrogel-coated coils allow for expansion between gaps, making it highly effective as a minimally invasive treatment.

Portosystemic venous shunts occur in patients with polysplenia after the Fontan operation. In the long term, these shunts are associated with hyperammonaemia and portal-systemic encephalopathy. Since some shunts are long and tortuous, catheter interventions to close them could be challenging. Instead, a steerable microcatheter could be used for coil embolisation of tortuous portosystemic venous shunts.

Vessel occlusion is a frequently used procedure to close congenital or acquired collaterals or communications. We report two cases of successful vessel closure, in small infants with CHD, using the Azur CX Peripheral Coil System. The low profile of the device, the controlled delivery of the coils, and the delivery through a microcatheter make it particularly interesting for the occlusion of highly tortuous vessels in children.

Significant aortopulmonary collaterals in cyanotic CHD patients require closure immediately before definitive intracardiac repair. Traditionally, the transfemoral access has been used for this purpose; however in a few cases, selective and stable hooking of collaterals may be extremely difficult. We describe a case in which we used a new approach for collateral embolisation in a difficult situation.