In vitro testing of a temporary catheter-based aortic "parachute" valve.

摘要: Recently developed technologies allow aortic valve implantation off-pump in a beating heart. In this procedure, the native, stenotic is not removed, but simply crushed by pressure balloon mounted on percutaneous catheter. Removal of native cusps before replacement may reduce incidence annular or cuspal calcium embolization and late perivalvular leaks increase implantable size. However, temporary system ascending aorta be necessary to maintain hemodynamic stability reducing acute regurgitation left ventricular volume overload. This study evaluates effects wire-mounted, monoleaflet, apparatus mechanical cardiovascular simulator. Aortic flow, systemic were continuously monitored. An intraluminal camera obtained real-time proximal distal images operation. Insertion parachute simulator increased diastolic from 7 38 mm Hg. Cardiac output 2.08 4.66 L/min regurgitant decreased 65 23 mL. conclusion, placement help improve replacement.