Mitral valve replacement and implantation of an extracardial mesh frame in patients with severe heart failure: results of a clinical study and a description of a clinical case 18 years after surgery

Abstract

Aim    Dilated cardiomyopathy (DCMP) is a major cause for severe heart failure. Development of a combination (drug and surgery) treatment of this disease is relevant. This prospective observational study was aimed at evaluating short- and long-term results of extracardiac mesh implantation in DCMP patients with heart failure resistant to the optimum drug therapy.Material and methods    The extracardiac mesh ACOR-1 was implanted in 15 patients with DCMP. All meshes were produced individually for each patient and made of Gelweave (great Britain) vascular graft strips. The mesh size corresponded to the heart diastolic size, which was measured after achieving a maximum possible clinical improvement for the patient. Long-term results were followed for up to 4 years. Mean age of patients was 43.1±10.8 years (from 28 to 62 years). One patient was followed up for 18 years. Data of that patient were presented as a clinical case report.Results    From October, 2003 through October, 2007, 15 DCMP patients received mesh implants. Cases of in-hospital death were absent. In 3 mos. after the surgery, left ventricular volumes decreased (end-diastolic volume decreased from 251.7±80.7 to 229.0±61.3 ml; end-systolic volume decreased from 182.3±73.6 to 167.7±46.2 ml), and the left ventricular pump function improved (ejection fraction increased from 25.2±6.0 to 27.1±5.1 %; cardiac index increased from 2.0±0.5 to 2.4±0.7 ml /min /m2). The functional state of patients improved by one NYHA class, from 3.7±0.3 to 2.8±0.6. In some cases, the left ventricular size and the systolic function completely normalized. There were no episodes of circulatory decompensation in the long term after surgery. Actuarial survival for the observation period was 100%.Conclusion    Implantation of extracardiac mesh prevented progression of heart dilatation and, in combination with drug therapy, it may represent an effective method for treatment of DCMP.