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The dFFR values at stress. The values of dFFR proximal to the MB are ≈1. Most patients with an MB had a dFFR ≤0.76. Some patients with an MB showed full recovery of dFFR distal to the MB (A). B, The distribution of the patients according to the region of dFFR. – indicates dFFR >0.76; +, dFFR ≤0.76; dFFR, diastolic fractional flow reserve; MB, myocardial bridge.
