Utility of guide catheter extension and intravascular ultrasound to facilitate transcatheter device closure of aortic paravalvular leak
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Paravalvular leak (PVL) refers to the retrograde flow of blood through a channel between an implanted valve prosthesis and native cardiac tissue, due to the absence of an appropriate seal. Most PVLs are haemodynamically non-significant; however, large leaks ca... ...
