Which one of the following is the correct statement regarding coronary food flow
A. Coronary blood flow is directly related to perfusion pressure and inversely related to resistance
B. Coronary blood flow is inversely related to perfusion pressure and inversely related to resistance
C. Coronary blood flow is directly related to perfusion pressure and also to resistance
D. Coronary blood flow is inversely related to both pressures and resistance
Ans. A Factors regulating Coronary Blood Flow
·
Need for (i.e.
hypoxia) is the most important factor maintaining blood flow (by causing
vasodilation)
·
Metabolites eg
adenosine, K+, H+, CO2 causes vasodilation & increase blood flow
·
Nervous factors:
Sympathetic stimulation increases and parasympathetic stimulation decrease
coronary blood flow.
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