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- W2059793422 abstract "Myocardial edema and histologic changes consistent with tissue injury are reported in association with sepsis-induced myocardial depression. The objective of the present study was to determine whether, in the absence of shock, such changes (assessed by studying microvascular albumin flux, tissue edema, and morphometry) are prerequisites for the development of contractile dysfunction in sepsis. Sprague-Dawley rats were randomized into groups for either cecal ligation and perforation (CLP) or sham study. Twenty-four hours after entry of animals into the study, their myocardial function was assessed with the Langendorff isolated heart technique. Left-ventricular developed pressure (preload: 5 mm Hg) was reduced in CLP animals (34.9 +/- 3.3 mm Hg, n = 10) as compared with time-matched controls (46.4 +/- 4.0 mm Hg, n = 8, p < 0.05, unpaired t test). This was associated with a significant reduction in the maximal rate of increase (+ dP/dt(max)) and decrease (-dP/dt(max)) in left ventricular pressure in the CLP group (sham versus CLP, unpaired t test, p < 0.05). Upon reperfusion, after 30 min of ischemia, left ventricular resting tension was decreased in CLP as compared with sham-treated animals (sham versus CLP, analysis of variance (ANOVA) with repeated measures, p < 0.05). At 24 h, sepsis was not associated with myocardial edema (wet:dry weight ratio, sham = 4.094 +/- 0.098, n = 10; CLP = 4.185 +/- 0.066, n = 7), and tissue albumin flux was reduced (sham = 194 +/- 27 microliters. h-1. g dry wt-1, n = 10; CLP = 100 +/- 14 microliters. h-1. g dry wt-1, n = 7). In tissue processed for electron microscopy, we found no evidence of tissue injury or edema at either 24 or 48 h after CLP. We conclude that polymicrobial normotensive sepsis causes myocardial contractile depression in the absence of changes in myocardial structure." @default.
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- W2059793422 date "1997-11-01" @default.
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- W2059793422 title "Structure–Function Relationships in the Septic Rat Heart" @default.
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- W2059793422 doi "https://doi.org/10.1164/ajrccm.156.5.96-10085" @default.
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