[An attempt to estimate the value of myocardial contractility in left ventricular aneurysms].
Using monoplanar angiography at 30 degrees, the authors have attempted to quantify the effectiveness of the non-aneurysmal myocardium in 50 patients (17 of them having undergone surgery) with an aneurysm of the left ventricle. Having fixed the position of two points during systole and diastole, they first delimit the aneurysmal zone and/or neighbouring dyskinetic zones in relation to the zones which are still 'healthy'. By a method of integration based on the formula of the three levels, they first measure the global volume of the left ventricle and its ejection fraction, and gain an idea of the size of the aneurysm. They then evaluate the ejection fraction and the volumes of each of the other zones. They have shown that the prognosis depends upon the ejection fraction and the end-diastolic volume of the ventricle which is presumed to be healthy, these measurements being corrected according to the size, expressed as an ejection volume, of the adjacent dyskinetic zone, which can be assessed by an index (volume of the dyskinetic zone as a proportion of the total 'healthy' and dyskinetic zones, in turn expressed as a ratio of the ejection fraction). The application of this work is to be found in seeking a limit of operability for extensive left ventricular aneurysms with cardiac failure.
D006322:Heart Aneurysm / Q000503:physiopathology* / Q000601:surgery; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008722:Methods; D009200:Myocardial Contraction; D011183:Postoperative Complications; D011379:Prognosis
Tentative d'appréciation de la valeur contractile du myocarde dans les anévrysmes ventriculaires gauches.