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Figure 6 Flow-function relation in Group 3 dogs when (A) all myocardial regions are included and (B) small segments in the anterior wall supplied by the diagonal branch interspersed between two large perfusion defects are excluded. Red denotes the central portions of the perfusion defects, and green and blue denote the collateral blood flow-supplied zones and the remote normal myocardium, respectively. MBF = myocardial blood flow; WT = wall thickening.