End-systolic wall stress is a major determinant of postoperative left ventricular dysfunction in patients with congenital mitral regurgitation.
To clarify the contribution of afterload to left ventricular performance after repair of mitral regurgitation, we evaluated echocardiographically 8 children who had undergone surgical repair for isolated congenital mitral regurgitation. We examined the relationship between left ventricular systolic function and preload, afterload, and contractility. The left ventricular systolic function was strongly correlated with the afterload after the surgical repair. In the postoperative state, reducing afterload by vasodilators could be a useful means of treating cardiac failure, in addition to using catecholamines to increase the contractility.
D000293:Adolescent; D000328:Adult; D001783:Blood Flow Velocity / Q000502:physiology; D001794:Blood Pressure / Q000502:physiology*; D002648:Child; D002675:Child, Preschool; D004452:Echocardiography; D019918:Heart Valve Prosthesis Implantation / Q000009:adverse effects*; D006801:Humans; D007223:Infant; D008944:Mitral Valve Insufficiency / Q000151:congenital* / Q000503:physiopathology / Q000601:surgery*; D009200:Myocardial Contraction / Q000502:physiology; D011183:Postoperative Complications; D012307:Risk Factors; D013318:Stroke Volume / Q000502:physiology*; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging / Q000209:etiology* / Q000503:physiopathology*