A 68-year-old man with exertional angina was admitted to our hospital. Coronary angiography revealed a moderate stenosis in the mid right coronary artery (RCA) and an occluded atrioventricular (AV) branch with Rentrop grade 2 collaterals providing retrograde flow from the posterior descending (PD) branch (Panel A). A pressure wire (Opto Wire; Opsense, Quebec, Canada) was advanced to the PD branch. The fractional flow reserve (FFR) measurement was 0.86 and the diastolic pressure ratio (dPR) was 0.98 (Panel B and C).
2. Department of Cardiovascular Medicine, Gifu Heart Center, Japan
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