Abstract
In the normal heart, coronary microvascular resistance is tightly controlled, so that coronary blood flow may change rapidly up to four to sixfold to match closely the changing metabolic demands imposed by myocardial work (38). The major mechanisms exerting such close control are generally considered to be metabolic dilatation and autoregulatory responses to intraluminal pressure changes, each modulated by neurohumoral influences. However, recent studies, mainly in isolated coronary microvessels, have revealed pronounced flow-dependent changes in coronary microvascular diameter. This response clearly may play a significant role in the normally integrated control of coronary blood flow.
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Jones, C.J.H., Kuo, L., Yuan, Y., Chilian, W.M., Davis, M.J. (1995). Coronary Microvascular Responses to Flow. In: Bevan, J.A., Kaley, G., Rubanyi, G.M. (eds) Flow-Dependent Regulation of Vascular Function. Clinical Physiology Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-7527-9_8
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