Risk factors and the effects of xamoterol in idiopathic dilated cardiomyopathy.

Abstract:

:A long-term follow-up study was performed for 110 patients with idiopathic dilated cardiomyopathy (DCM) for 34 +/- 12 months (range 3-122 months). Thirteen patients died of heart failure, 15 of sudden death and one of non-cardiac death. The 3- and 5-year survival rates were 78 and 62%, respectively. The important factors in predicting the 3-year survival rate were left ventricular end-diastolic volume index (LVEDVI > or = 150 ml/m2 = 66%, < 150 ml/m2 = 93%, p < 0.01), myocardial cell diameter (> 25 microns = 42%, < or = 25 microns = 87%, p < 0.05) and sustained ventricular tachycardia (VT present = 32%, absent = 85%, p < 0.01). In a prospective study, 26 patients with DCM were given a beta 1-partial agonist, xamoterol (200 mg daily) and were followed for 35 +/- 15 months (6-53 months). The cardiothoracic ratio, left ventricular end-diastolic dimension and exercise heart rate decreased, and the exercise duration, fractional shortening and ejection fraction increased after xamoterol therapy. The 3-year survival rate was 83%. These results suggest that the important factors in predicting the survival rate of DCM patients were LVEDVI, myocardial cell diameter and the occurrence of VT. Adjunctive xamoterol therapy in DCM had a beneficial effect on hemodynamics and symptoms.

journal_name

J Cardiol

journal_title

Journal of cardiology

authors

Watanabe K,Hirokawa Y,Suzuki K,Masani F,Otsuka H,Izumi T,Shibata A

subject

Has Abstract

pub_date

1992-01-01 00:00:00

pages

417-25

issue

2-3

eissn

0914-5087

issn

1876-4738

journal_volume

22

pub_type

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