Incidence of heart failure in infarcted rats that die spontaneously

Incidence of heart failure in infarcted rats that die spontaneously

Author Flumignan, Ronald Luiz Gomes Autor UNIFESP Google Scholar
Kanashiro-Takeuchi, Rosimeire Miyuki Autor UNIFESP Google Scholar
Saraiva, Roberto Magalhães Autor UNIFESP Google Scholar
Portes, Leslie Andrews Autor UNIFESP Google Scholar
Antonio, Ednei Luiz Autor UNIFESP Google Scholar
Ishigai, Marcia Marcelino de Souza Autor UNIFESP Google Scholar
Tucci, Paulo José Ferreira Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract The present study reports for the first time the incidence of congestive heart failure (CHF) in previously infarcted rats that died spontaneously. Previously, pulmonary (PWC) and hepatic (HWC) water contents were determined in normal rats: 14 control animals were evaluated immediately after sacrifice, 8 placed in a refrigerator for 24 h, and 10 left at room temperature for 24 h. In the infarcted group, 9 rats died before (acute) and 28 died 48 h after (chronic) myocardial infarction. Thirteen chronic animals were submitted only to autopsy (N = 13), whereas PWC and HWC were also determined in the others (N = 15). Seven rats survived 48 h and died during anesthesia. Notably, PWC differed in normal rats: ambient (75.7 ± 1.3%) < control (77.5 ± 0.7%) < refrigerator (79.1 ± 1.4%) and there were no differences with respect to HWC. No clinical signs of CHF (dyspnea, lethargy or foot edema) were observed in infarcted rats before death. PWC was elevated in all chronic and anesthetized rats. HWC was increased in 48% of chronic and in all anesthetized rats. Our data showed that PWC needs to be evaluated before 24 h post mortem and that CHF is the rule in chronic infarcted rats suffering natural death. The congestive syndrome cannot be diagnosed correctly in rats by clinical signs alone, as previously proposed.
Keywords Heart failure
Myocardial infarction
Pulmonary congestion
Hepatic congestion
Language English
Date 2006-10-01
Published in Brazilian Journal of Medical and Biological Research. Associação Brasileira de Divulgação Científica, v. 39, n. 10, p. 1323-1328, 2006.
ISSN 0100-879X (Sherpa/Romeo, impact factor)
Publisher Associação Brasileira de Divulgação Científica
Extent 1323-1328
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000242173300008
SciELO ID S0100-879X2006001000008 (statistics in SciELO)

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