scholarly journals Durable Left Ventricular Assist Device with Mechanical Mitral and Aortic Valves

2021 ◽  
Vol 31 (12) ◽  
pp. 1516-1517
Keyword(s):  
Left Ventricular Assist Device ◽  
Ventricular Assist Device ◽  
Left Ventricular ◽  
Aortic Valves ◽  
Assist Device ◽  
Ventricular Assist ◽  
Left Ventricular Assist

Management of a mechanical aortic valve during left ventricular assist device implantation in a previously replaced aortic root

2021 ◽  
pp. 039139882199066
Author(s):  
Tamam Tulimat ◽  
Bassam Osman ◽  
Jean Beresian ◽  
Pierre Sfeir ◽  
Jamil Borgi
Keyword(s):  
Aortic Valve ◽  
Left Ventricular Assist Device ◽  
Ventricular Assist Device ◽  
Mechanical Valve ◽  
Left Ventricular ◽  
Aortic Valves ◽  
Assist Device ◽  
Ventricular Assist ◽  
Tissue Valve ◽  
Left Ventricular Assist

The use of left ventricular assist device (LVAD) in patients with mechanical aortic valves may result in thromboembolic events due to blood stasis around the valve and intermittent valve opening. Mechanical aortic valves encountered during LVAD implantation are managed by replacement with a tissue valve, or closure of the valve with a patch. Closure of the valve carries the risk of sudden death in cases of LVAD stoppage. Replacing the whole mechanical valve conduit is time consuming and carries a significant risk of bleeding and right ventricular (RV) failure. We describe an alternative technique of replacing a mechanical aortic valve by breaking its inner leaflets and sewing a tissue valve on top of the mechanical valve ring.

Ultrastructural observations of the aorta of calves implanted with a mechanical left ventricular assist device

1990 ◽  
Vol 48 (3) ◽  
pp. 834-835
Author(s):  
J P Cassella ◽  
V Salih ◽  
T R Graham
Keyword(s):  
Left Ventricular Assist Device ◽  
Ventricular Assist Device ◽  
Left Ventricular ◽  
Aortic Tissue ◽  
Assist Device ◽  
Ventricular Assist ◽  
Transmission Electron ◽  
Left Ventricular Assist ◽  
Preliminary Study

Left ventricular assist systems are being developed for eventual long term or permanent implantation as an alternative to heart transplantation in patients unsuitable for or denied the transplant option. Evaluation of the effects of these devices upon normal physiology is required. A preliminary study was conducted to evaluate the morphology of aortic tissue from calves implanted with a pneumatic Left Ventricular Assist device-LVAD. Two 3 month old heifer calves (calf 1 and calf 2) were electively explanted after 128 days and 47 days respectively. Descending thoracic aortic tissue from both animals was removed immediately post mortem and placed into karnovsky’s fixative. The tissue was subsequently processed for transmission electron microscopy (TEM). Some aortic tissue was fixed in neutral buffered formalin and processed for routine light microscopy.

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