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Unformatted text preview: 225.7% change. d) Pumping work is area under the solid curves. Work before: 10850 mmHg mL, Work after: 16200 mmHg mL. Ritter 4.14 Contractility is defined on a pressure volume curve as the slope of the left ventricular pressure volume points connected at end-systole after an experiment in which afterload is increased. Be able to draw this slope on a pressure volume diagram. Ritter 4.20 a) Power = 0.976 Watts b) Total metabolic energy = 11.16 Watts c) Change in pressure during isovolumic contraction is approx 90 mmHg. Transmural pressure difference is 89 mmHg. Use Laplaces equation for the heart (provided in the class slides) and a wall thickness of 1.5 cm to compute wall stress....
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This note was uploaded on 11/14/2011 for the course ECE 3820 taught by Professor Wang during the Fall '11 term at GWU.
- Fall '11