Di Lenarda A, De Maria R, Gavazzi A, Gregori D, Parolini M, Sinagra G, Salvatore L, Longaro F, Bernobich E, Camerini F. Long-term survival effect of metoprolol in dilated cardiomyopathy. The SPIC (Italian Multicentre Cardiomyopathy Study) Group.
HEART (BRITISH CARDIAC SOCIETY) 1998;
79:337-44. [PMID:
9616339 PMCID:
PMC1728660 DOI:
10.1136/hrt.79.4.337]
[Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE
To evaluate the additive effect of metoprolol treatment on long-term incidence of fatal and non-fatal cardiac events in idiopathic dilated cardiomyopathy.
DESIGN
586 patients with idiopathic dilated cardiomyopathy were prospectively enrolled in a multicentre registry and followed up for a mean (SD) of 52 (32) months. Metoprolol, carefully titrated to the maximum tolerated dose, was added to conventional heart failure treatment in 175 patients.
RESULTS
Survival and transplant-free survival at seven years were significantly higher in the 175 metoprolol treated patients than in the remaining 411 on standard treatment (81% v 60%, p < 0.001, and 69% v 49%, p < 0.001, respectively). By multivariate analysis, metoprolol independently predicted survival and transplant-free survival (relative risk reduction values for all cause mortality and combined mortality or transplantation 51% (95% confidence interval 21% to 69%), p = 0.002, and 34% (5% to 53%), p = 0.01, respectively). New York Heart Association class, left ventricular end diastolic diameter, and pulmonary wedge pressure were also predictive. Seven year survival (80% v 62%, p = 0.004) and transplant-free survival (68% v 51%, p = 0.005) were significantly higher in 127 metoprolol treated cases than in 127 controls selected from the entire control cohort and appropriately matched. Metoprolol was associated with a 30% reduction in all cause mortality (7% to 48%, p = 0.015) and a 26% reduction in mortality or transplantation (7% to 41%, p = 0.009).
CONCLUSIONS
The addition of metoprolol to standard heart failure treatment, including angiotensin converting enzyme inhibitors, was effective in the long-term, reducing both all cause mortality and transplantation in patients with idiopathic dilated cardiomyopathy.
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