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The prognostic indicators of a favorable clinical evolution in dilated cardiomyopathy


, : The prognostic indicators of a favorable clinical evolution in dilated cardiomyopathy. Cardiologia 39(2): 87-93

Improvement in cardiac function and clinical status has been described in subgroups of patients with dilated cardiomyopathy (DCM), but predictors of favourable outcome have not been unequivocally established. In 33 patients with DCM followed up for a mean of 23 months (range 3-68) a full non-invasive and invasive diagnostic work-up, including endomyocardial biopsy, was performed. At the end of the follow-up, 13 patients (39%; Group A) showed a significant improvement in their clinical status (> or = 1 gain in NYHA functional class) and cardiac function (> 0.10 increase in echocardiographic ejection fraction), while 20 (61%; Group B) either stabilized or deteriorated (5 died and 4 underwent successful heart transplantation). Clinical, hemodynamic and morphometric data of the 2 groups were compared. Only lower systemic vascular resistance (Group A 2,836 +/- 637 versus Group B 3,637 +/- 1113; p = 0.025) and higher prevalence of alcohol intake > 80 g/day (Group A 85% versus Group B 40%; p = 0.03) were significantly associated with improvement. Discriminant analysis utilizing these 2 variables along with cardiac index, mitral regurgitation, pulmonary resistance and cardiothoracic ratio reached a discriminant power of 72% (p = 0.0014). The above results suggest that, in our series, relatively simple data provide the most accurate assessment of prognosis. Yet, prediction of favourable versus unfavourable outcome remains uncertain, since an incorrect prognosis will be made in 28% of cases. Morphometric analysis of endomyocardial bioptic specimens does not provide significant prognostic information. The identification of a high alcohol intake has a clinical relevance, since abstention from alcoholic beverages is significantly associated with a favourable outcome in our patients.

US$29.90

PMID: 8013020


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