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Am J Physiol Heart Circ Physiol (October 10, 2002). doi:10.1152/ajpheart.00106.2002
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Articles in PresS, published online ahead of print October 10, 2002
Am J Physiol Heart Circ Physiol, 10.1152/ajpheart.00106.2002
Submitted on February 8, 2002
Accepted on September 20, 2002

3D MRI Assessment of regional left ventricular systolic wall stress in patients with reperfused myocardial infarction

Stephane F. Delepine1*, Alain P. Furber1, Farzin Beygui1, Fabrice Prunier1, Philippe Balzer2, Jean Jacques Le Jeune2, and Philippe Geslin1

1 Department of Cardiology, University Hospital of Angers, Angers, France
2 Department of Biophysics, University Hospital of Angers, Angers, France

* To whom correspondence should be addressed. E-mail: stephanedelepine{at}yahoo.fr.

Background: The aim of this study was to assess the regional variations of end-systolic wall stress provided by MRI, in patients with reperfused Q-wave acute myocardial infarction (AMI), using a 3D approach. Methods: 15 normal volunteers and 50 patients with reperfused AMI underwent cardiac MRI using a short-axis fast gradient-echo sequence. The end-systolic wall stress was calculated using the Grossman formula with the radius and the wall thickness defined with a 3D approach using the tridimensional curvature. Results: The mean wall stress was significantly increased at each level of short axis-plane only in patients with anterior AMI. When calculated at a regional level, in patients with anterior AMI, wall stress significantly increased in anterior sector as well as normal sector. In patients with inferior AMI, wall stress significantly increased only in inferior and lateral sectors. Conclusion: The quantification of regional wall stress by cardiac MRI is better by 3D approach than others methods for precise evaluation in patients with AMI. In spite of an early reperfusion, the wall stress remained increased in patients with anterior AMI.




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