Temperature Distribution and Transport of Heat in the Canine Myocardium
Under aerobic conditions energy is liberated in the heart by conversion of substrates into water and carbon dioxide. It leaves this organ in the form of work and heat. The amount of work can be determined rather precisely and with relative ease from pressure and flow in aorta and pulmonary artery (McDonald, 1974). The amount of heat produced cannot be measured so easily. This report deals with the measurement of total heat produced by the heart in the intact animal. Attempts to measure local heat production in the left ventricular wall will be discussed as well.
KeywordsHeat Loss Myocardial Blood Flow Heat Production Left Ventricular Wall Metabolic Heat Production
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- BUCKBERG, G.D., LUCK, J.C., HOFFMAN, J.I.E., ARCHIE, J.P., and FIXLER, D.E. (1971): Some sources of error in measuring regional blood flow with radioactive microspheres. J. Appl. Physiol. 31: 5988–604.Google Scholar
- CARSLAW, H.S., and JAEGER, J.C. (1978): “Conduction of Heat in Solids”. Oxford University Press, Oxford; reprinted from the second edition (1959).Google Scholar
- COULSON, R.L. (1976): Energetics of isovolumic contractions of the isolated rabbit heart. J. Physiol. 260: 45–53.Google Scholar
- GIBBS, C.L. (1978): Cardiac energetics. Physiol. Rev. 58: 174–254.Google Scholar
- MCDONALD, U.A. (1974): “Blood Flow in Arteries”. Second Edition. Edward Arnold, London.Google Scholar
- MCDONALD, R.H. Jr. (1971): Myocardial heat production: its relationship to tension development. Am. J. Physiol. 220: 894–900Google Scholar
- NEILL, W.A., LEVINE, H.J., WAGMAN, R.J., MESSER, J.V., KRASNOW, N., and GORLIN, R. (1961): Left ventricular heat production measured by coronary flow and temperature gradient. J. Appl. Physiol. 16: 883–890.Google Scholar
- TEN VELDEN, G.H.M. (1982): Heat production of the canine left ventricle. PhD thesis. Free University, Amsterdam.Google Scholar
- TEN VELDEN, G.M.H., ELZINGA, G., and WESTERHOF, N. (1982): Left ventricular energetics — Heat loss and temperature distribution of canine myocardium. Circ. Res. 50: 63–73.Google Scholar
- SYMAN, J. Jr (1948): Heme proteins. Advances in Protein Chem. 4: 443–471.Google Scholar