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- W2013160285 abstract "Objective: Dilated cardiomyopathy (DCM) is associated with a progressive deterioration in cardiac function. We hypothesised that some of the deleterious effects of DCM could be reduced by mechanically limiting the degree of cardiac dilatation. Methods: A Transonic 20A cardiac output (CO) flow-probe was implanted in the pulmonary artery of 12 adult (52±4 kg) sheep. Early heart failure was created by rapid right ventricular (RV) pacing for 21 days at a rate which resulted in an initial 10% decrease in CO (to a maximum of 190 bpm). A custom polyester jacket (Acorn Cardiovascular, St Paul, MN) was then placed, via a partial lower sternotomy, on the ventricular epicardium of all sheep. Animals were randomised either to jacket retention (wrap) or removal (sham). Pacing was recommenced at a higher rate (that initiated a further 10% decrease in CO) for 28 days. Haemodynamic and echocardiographic parameters were determined at baseline, implant and at termination. Results: At termination, the left ventricular fractional shortening was significantly higher (p=0.03), the degree of mitral valve regurgitation lower (scaled 0–3) (p=0.03) and the left ventricular long axis area smaller (p=0.02) in the wrap animals compared with sham. Conclusions: In this model of heart failure, ventricular constraint with a polyester jacket diminished the deterioration in cardiac function associated with progressive dilated cardiomyopathy. These results suggest that maintainance of a more normal cardiac size and shape may be beneficial in patients with dilated cardiomyopathy." @default.
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- W2013160285 date "1999-12-01" @default.
- W2013160285 modified "2023-10-12" @default.
- W2013160285 title "Passive ventricular constraint amends the course of heart failure: a study in an ovine model of dilated cardiomyopathy" @default.
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- W2013160285 doi "https://doi.org/10.1016/s0008-6363(99)00255-2" @default.
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