Al-Mukhaini M, Argentin S, Morin JF, Benny C, Cusson D, Huynh T. Myocardial performance index as predictor of adverse outcomes following mitral valve surgery.
Eur J Echocardiogr 2003;
4:128-34. [PMID:
12749874 DOI:
10.1053/euje.2002.0630]
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Abstract
AIMS
We aim to determine whether the myocardial performance index, will be a good predictor of adverse outcomes following mitral valve surgery.
METHOD
We prospectively measured pre-operative myocardial performance index in 22 consecutive patients, with moderate to severe mitral insufficiency, undergoing corrective mitral valve surgery. The primary endpoint was predefined as either peri-operative death or congestive heart failure.
RESULTS
The primary endpoint occurred in nine patients. Five of the six patients with myocardial performance index >or=0.7 had primary endpoints. Chi-square testing demonstrated that the primary endpoint was significantly associated with advanced age (>or=70 years) and myocardial performance index >or=0.7 (P=0.003 and 0.01 respectively). There was a trend towards significant association of depressed left ventricle ejection fraction (left ventricle ejection fraction <or=40%) and the primary endpoint (P=0.09). Although left ventricle ejection fraction <or=40% was more sensitive in predicting the primary endpoint, it has lower specificity, accuracy and predictive values than myocardial performance index >or=0.7.
CONCLUSION
Our results suggest that myocardial performance index is a potentially useful predictor of increased risk of peri-operative death or congestive heart failure, in patients with moderate-severe mitral insufficiency undergoing corrective mitral valve surgery. In conjunction with left ventricle ejection fraction, it may be helpful in the pre-operative prognostication of these patients.
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