Key result
Mitral valve replacement decreased left ventricular preload in both regurgitation and stenosis groups, but marked impairment in global systolic pump function occurred only in the regurgitation group.
Why the study?
What are the immediate effects of mitral valve replacement on left ventricular function in patients with mitral regurgitation or stenosis?
Observational
What are the immediate effects of mitral valve replacement on left ventricular function in patients with mitral regurgitation or stenosis?
Transoesophageal echocardiography reveals immediate post-operative diastolic dysfunction in all mitral valve replacements and systolic impairment specifically in mitral regurgitation, which are not reflected by standard haemodynamics.
Answers are grounded in this paper and cite their sources.
Immediate post-MVR systolic impairment in regurgitation warrants perioperative caution; leaves open long-term outcome impact.
Patients undergoing mitral valve surgery are at risk of left ventricular failure in the immediate post-operative period. In order to understand better the mechanisms of post-operative haemodynamic instability, we used transoesophageal echocardiography to assess the immediate response of the left ventricle to mitral valve replacement for mitral regurgitation or stenosis. A decrease in left ventricular preload, despite adequate filling pressures, was common to both groups and suggests the presence of diastolic dysfunction. A marked impairment in global systolic pump function was observed only in the regurgitation group and correlated with the left ventricular afterload. Transoesophageal echocardiography provides valuable information on the individual changes in left ventricular function and its determinants after mitral valve replacement that are not reflected by haemodynamic measurements.
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Skarvan et al. (1999) conducted an observational in Mitral regurgitation or stenosis. Mitral valve replacement was evaluated on Immediate response of the left ventricle (preload and systolic pump function). Mitral valve replacement decreased left ventricular preload in both regurgitation and stenosis groups, but marked impairment in global systolic pump function occurred only in the regurgitation group.
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