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  • Title: Relation between myocardial histological changes and ventricular tachycardia in cardiomyopathy: a study by 24-hour ECG-monitoring and endomyocardial biopsy.
    Author: Segawa I, Suzuki T, Kato M, Tashiro A, Satodate R.
    Journal: Heart Vessels Suppl; 1990; 5():37-40. PubMed ID: 2093710.
    Abstract:
    The relation between myocardial histological changes and ventricular tachycardia (VT) in cardiomyopathy was investigated. Right ventricular endomyocardial biopsy and 24-hour ECG-monitoring were performed in 19 patients with dilated cardiomyopathy (DCM) and 22 with hypertropic cardiomyopathy (HCM). Cardiomyopathy was histologically divided into the following four groups: group A, hypertrophy without disarray of myocytes (3 DCM and 7 HCM); group B, hypertrophy with disarray of myocytes (14 HCM); group C, fibrosis (9 DCM and 1 HCM); and group D, diffuse myocytic degeneration (7 DCM). VT was observed in 20% (2 of 10 patients) of group A, 14% (2 of 14) of group B, 80% (8 of 10) of group C, and 71% (5 of 7) of group D. The degenerating myocytes and/or the irregular distribution of fibrosis may play an important role in the etiology of VT in cardiomyopathy.
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