Key result
Stroke volume under 35 ml and elevated resting pressures predict Lillehei-Kaster mitral valve dysfunction.
Why the study?
Does haemodynamic evaluation predict valve dysfunction in patients with Lillehei-Kaster mitral valves?
Observational (n=13)
Does haemodynamic evaluation predict valve dysfunction in patients with Lillehei-Kaster mitral valves?
Answers are grounded in this paper and cite their sources.
Stroke volumes <35 ml and elevated resting pulmonary wedge and mean arterial pressures can help identify prosthetic mitral valve dysfunction.
Clinical deterioration after insertion of prosthetic mitral valves may be caused by myocardial failure or valve dysfunction or a combination of both. The need for a method to decide which is predominantly causative is obvious. This study describes the haemodynamic findings with special reference to prosthesis rheology among 13 patients with lillehei-Kaster valves in the mitral ostium. Three patients were re-operated on because clinical signs of valvular dysfunction. Our investigation indicates that stroke volumes of less than 35 ml were useful in predicting valve dysfunction and that pulmonary wedge and mean arterial pressure at rest were significantly increased in this group of patients. It is advocated that such haemodynamic findings should lead to further evaluation of valve gradient and valve flow.
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Uhrenholdt et al. (1980) conducted an observational in Prosthetic mitral valve (n=13). Lillehei-Kaster valve in the mitral ostium was evaluated on Valve dysfunction. Stroke volumes of less than 35 ml, along with significantly increased pulmonary wedge and mean arterial pressure at rest, were useful in predicting valve dysfunction in patients with Lillehei-Kaster mitral valves.
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