Summary
Heart contraction is the cause of pulsatile coronary arterial and venous flow. It also reduces time-averaged flow through the myocardium, also referred to as myocardial perfusion. The impediment of myocardial perfusion is predominantly subendocardial, which for a long time resulted in the paradigm that this impediment was caused by a tissue pressure coupled to left ventricular pressure. However, it has recently been shown that heart muscle contraction directly affects coronary blood flow. A unique concept of contraction-perfusion interaction is lacking. Both contractility and left ventricular pressure do affect coronary perfusion, but are mutually dependent. An important determinant for the contraction-perfusion interaction appears to be the filling of the intramyocardial vasculature and the structure of the connections between vessel walls and myocytes. Different aspects of the contraction-perfusion interaction are considered, including the effect of contraction on lymph pressure.
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© 1993 Springer-Verlag Tokyo
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Spaan, J.A.E. (1993). Heart Contraction and Coronary Blood Flow. In: Maruyama, Y., Kajiya, F., Hoffman, J.I.E., Spaan, J.A.E. (eds) Recent Advances in Coronary Circulation. Springer, Tokyo. https://doi.org/10.1007/978-4-431-68249-3_7
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DOI: https://doi.org/10.1007/978-4-431-68249-3_7
Publisher Name: Springer, Tokyo
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