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Kidney Blood Press Res. 2012;35(3):167-73. doi: 10.1159/000331562. Epub 2011 Nov 24.

The course of heart failure development and mortality in rats with volume overload due to aorto-caval fistula.

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1
Department of Cardiology, Institute for Clinical and Experimental Medicine - IKEM, Prague, Czech Republic.

Abstract

BACKGROUND:

There are only few studies documenting the long-term outcome of aorto-caval fistula (ACF) in rats, a model of volume overload heart failure (HF). The aim of the present study was to describe HF-related morbidity and mortality, and to examine the relation between cardiac hypertrophy and survival.

METHODS:

Adult male Wistar rats underwent needle ACF or sham operation and 71 animals surviving the acute procedure with patent ACF were followed for 52 weeks.

RESULTS:

By the end of the study, 72% of the ACF animals deceased and 82% developed HF signs. Of the HF rats, 65% died (median: 3 weeks after HF onset). Before death, body weight increased by 9% followed by a final drop. 28% ACF rats died suddenly, without preceding HF. Sudden death occurred earlier and in the rats with a trend to larger hearts (p = 0.07). In the whole ACF cohort, heart weight (heart weight/body weight ratio) was inversely associated with the length of survival (r = -0.51, p < 0.001).

CONCLUSION:

The median survival of ACF Wistar rats is 43 weeks, longer than reported in other rat strains. Increased heart weight is associated with higher mortality and a significant number of animals die suddenly.

PMID:
22116309
DOI:
10.1159/000331562
[Indexed for MEDLINE]
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