Forward coronary flow normally seen in systole is the result of both forward and concealed back flow.

摘要: Normally systolic coronary blood flow is almost entirely forward. As perfusion pressure was lowered through the autoregulatory range in open-chest dogs, net back appeared at ∼70 mm Hg. Imposing a series resistance (Rs), which impedes both forward and flow, abolished this reverse resulted flow. Thus we conclude that under normal conditions pattern of contains substantial component.