Novalia P Sidik, Bethany Stanley, Robert Sykes, Andrew J Morrow, Conor P Bradley, Michael McDermott, Thomas J Ford, Giles Roditi, Allister Hargreaves, David Stobo, Jacqueline Adams, John Byrne, Ahmed Mahrous, Robin Young, David Carrick, Ross McGeoch, David Corcoran, Ninian N Lang, Robert Heggie, Olivia Wu, Margaret B McEntegart, Alex McConnachie, Colin Berry
BACKGROUND: We investigated the usefulness of invasive coronary function testing to diagnose the cause of angina in patients with no obstructive coronary arteries. METHODS: Outpatients referred for coronary computed tomography angiography in 3 hospitals in the United Kingdom were prospectively screened. After coronary computed tomography angiography, patients with unobstructed coronary arteries, and who consented, underwent invasive endotyping. The diagnostic assessments included coronary angiography, fractional flow reserve (patient excluded if ≤0...
October 5, 2023: Circulation