A Prospective, Multicenter, Observational Study of the Safety and Efficacy of Emergency Transcatheter Aortic Valve Replacement in Patients With Severe Aortic Stenosis

In this study, the transcatheter aortic valve and its recycling delivery system were VitaFlow Liberty®, a TAVR product independently developed by Shanghai Minimally Invasive Cardiovascular Treatment Co., Ltd. (approved and marketed by NMPA). This product is equipment/consumables routinely purchased by hospitals. For routine clinical use, it is designed for transcatheter aortic valve implantation. The valve is delivered to the intended implantation site via the peripheral artery by retrograde flow through the delivery system, realizing the delivery, positioning and release of the valve. Under the supervision of medical imaging equipment, the valve is delivered to the lesion site of the aortic valve, and marked by the diseased aortic annulus, to release the valve and relieve the stenosis at the lesion site, thereby ensuring smooth aortic flow, improving cardiac function and achieving therapeutic purposes.