Key result
Subvalvular pannus removal improves hemodynamics of older mechanical mitral valves during redo cardiac surgery.
Why the study?
Does removal of subvalvular pannus improve haemodynamic function in patients with previously placed mechanical mitral valves requiring redo cardiac surgery?
Case Report (n=4)
Does removal of subvalvular pannus improve haemodynamic function in patients with previously placed mechanical mitral valves requiring redo cardiac surgery?
Removal of subvalvular pannus during redo cardiac surgery can improve the haemodynamic function of older mechanical mitral valves.
Should not yet change redo mitral surgery practice; hypothesis-generating for pannus removal in small case series.
Patients requiring redo cardiac surgery for diseased heart valves other than mitral valves may show increased pressure gradients and reduced valve areas of previously placed mechanical mitral valves due to subvalvular pannus formation. We treated four women who had mechanical mitral valves inserted greater than or equal to 20 years earlier and who presented with circular pannus that protruded into the lower margin of the valve ring but did not impede leaflet motion. Pannus removal improved the haemodynamic function of the mitral valve.
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Kim et al. (2016) conducted a case report in Subvalvular pannus formation in previously placed mechanical mitral valves (n=4). Pannus removal was evaluated on Haemodynamic function of the mitral valve. Removal of subvalvular pannus improved the haemodynamic function of older, previously replaced mechanical mitral valves in four women undergoing redo cardiac surgery.
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