Key result
Volume loading in a canine model of CHF decreased transmural left ventricular end-diastolic pressure and stroke work, while contractility remained unchanged.
Why the study?
Does volume loading alter true myocardial contractility in a canine model of congestive heart failure?
Does volume loading alter true myocardial contractility in a canine model of congestive heart failure?
In a canine model of CHF, the apparent decrease in contractility during volume loading is an artifact of external constraint and ventricular interaction, as contractility remains unchanged when assessed by transmural LVEDP.
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Warrants caution interpreting hemodynamics in CHF volume studies; leaves open translation from canine models to clinical practice.
Moore et al. (2001) studied Congestive heart failure (n=6). Volume loading was evaluated on Stroke work and transmural left ventricular end-diastolic pressure relations. Volume loading in a canine model of CHF decreased transmural left ventricular end-diastolic pressure and stroke work, while contractility remained unchanged.
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