Venticular expression of atrial and brain natriuretic peptides in patients with myocarditis.

Abstract:

:We analyzed the ventricular expression of atrial and brain natriuretic peptides (ANP and BNP) in patients with myocarditis. Immunohistochemical analysis of endomyocardial biopsy specimens showed ANP and BNP immunoreactivity in the early myocarditis group (ANP in 4/10 and BNP in 3/10) and the late myocarditis group (ANP and BNP in 4/10), but not in the controls (0/8). Hemodynamic parameters, such as left ventricular volume indexes, pulmonary capillary wedge pressure, and left ventricular end-diastolic pressure, were higher and the cardiac index and ejection fraction were lower in the patients positive for ANP and/or BNP. Histological changes, including myocyte size, cellular necrosis, inflammatory infiltrates and fibrosis, were more severe in the immunohistochemically positive biopsy specimens. In the autopsy hearts, ANP- or BNP-positive myocytes were noted in the chronic myocarditis or postmyocarditis group, but not in acute fulminant myocarditis or in normal controls. Both ANP and BNP were predominantly localized in the residual myocytes edging the myocardial lesions, and also in the myocytes just beneath the left ventricular endocardium. This study demonstrated augmented ventricular ANP and BNP expressions in patients with myocarditis, and suggested that regional stress is important in the augmentation of these peptides as well as hemodynamic stress.

journal_name

Int J Cardiol

authors

Takemura G,Fujiwara H,Takatsu Y,Fujiwara T,Nakao K

doi

10.1016/0167-5273(95)02468-9

subject

Has Abstract

pub_date

1995-12-01 00:00:00

pages

213-22

issue

3

eissn

0167-5273

issn

1874-1754

pii

0167527395024689

journal_volume

52

pub_type

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