[Late results of the isolated replacement of the aortic valve by the Björk prosthesis with a minimum follow-up of over 10 years].
In this retrospective study 161 aortic valve replacements performed between January, 1970 and December, 1975 in patients with chronic aortic valve disease are reviewed with a minimum post-operative follow-up of 10 years. Patients' mean age at the time of surgery was 49 +/- 13 years. There were 61 cases of aortic valve regurgitation, 61 cases of aortic valve stenosis and 39 cases of combined aortic valve stenosis and regurgitation. Pre-operative values representative of left ventricular enlargement and systolic dysfunction were: mean cardiothoracic ratio 0.56 +/- 0.06; mean cardiac index 2.4 +/- 0.6 1/min/m2; mean ejection fraction 49 +/- 10 p. 100. Early (1st month) post-operative mortality was 5 p. 100 and late mortality 34.6 p. 100. Death was either sudden (37 p. 100) or due to poor myocardial results (21 p. 100). The actuarial survival rate was 89 +/- 2 p. 100 at 5 years and 78 +/- 3 p. 100 at 10 years. It was significantly influenced by the patient's pre-operative functional status (p less than 0.017) and by a cardiothoracic ratio greater than 0.55 (p = 0.05). Survival at 10 years was altered, though not significantly, in the aortic valve regurgitation group. Ninety-five patients have survived with a mean post-operative follow-up of 142 +/- 14 months; 82p. 100 have few or no symptoms, and the percentage of poor myocardial results is 20 p. 100. Ten years after surgery, 96 p. 100 of the patients were free from thromboembolic accidents and 90 p. 100 had not required reoperation.(ABSTRACT TRUNCATED AT 250 WORDS)
D000206:Actuarial Analysis; D000328:Adult; D001021:Aortic Valve; D003645:Death, Sudden; D005260:Female; D005500:Follow-Up Studies; D006349:Heart Valve Diseases / Q000209:etiology / Q000401:mortality; D006350:Heart Valve Prosthesis / Q000401:mortality; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012189:Retrospective Studies; D012306:Risk
Résultat tardif du remplacement valvulaire aortique isolé par prothèse de Björk avec un recul minimal supérieur à 10 ans.