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Figure 1 Measurement of Post-PCI IMR After PCI
IMR = Pd hyperhemia · Tmn hyperhemia. (A) Patient A undergoing direct stenting with low post-PCI IMR value and no troponin release. (B) Patient B undergoing conventional stenting with higher post-PCI IMR value and troponin release (troponin T = 0.042 ng/ml). CFR = coronary flow reserve; FFR = fractional flow reserve; IMR = index of microcirculatory resistance; Pa = arterial pressure; PCI = percutaneous coronary intervention; Pd = distal pressure; Tmn = mean transit time.
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