Lack of relation between imaging and physiology in ostial coronary artery narrowings

This study compared ostial lesion angiographic severity with physiologic assessment and showed that, for diameter narrowings >70%, fractional flow reserves were >0.75 in 20 of 25 lesions and >0.75 in 30 of 30 lesions with <70% diameter narrowings. Using fractional flow reserve in all ostial narrowings ≥70% may prevent patients from undergoing unnecessary interventions.