biostudies-literatureUnknown5(2)Fladseth K<h4>Objective</h4>Patients referred for acute coronary angiography (CAG) with unstable angina (UA) have low mortality and low rate of obstructive coronary artery disease (CAD). Better pre-test selection criteria are warranted. We aimed to assess the current guidelines against other clinical variables as predictors of obstructive CAD in patients with UA referred for acute CAG.<h4>Methods</h4>From 2005 to 2012, all CAGs performed at the University Hospital of North Norway, the sole provider of CAG in the region, were recorded in a registry. We included 979 admissions of UA and retrospectively collected data regarding presenting clinical parameters from patient hospital records. Obstructive CAD was defined as ≥50% stenosis and considered prognostically significant if found in the left main stOpen hearte000888https://www.ebi.ac.uk/biostudies/studies/S-EPMC6241968biostudies-literaturePre-test characteristics of unstable angina patients with obstructive coronary artery disease confirmed by coronary angiography.PMC6241968Mannsverk JKristensen ASchirmer HTrovik TFladseth KfalsePre-test characteristics of unstable angina patients with obstructive coronary artery disease confirmed by coronary angiography.<h4>Objective</h4>Patients referred for acute coronary angiography (CAG) with unstable angina (UA) have low mortality and low rate of obstructive coronary artery disease (CAD). Better pre-test selection criteria are warranted. We aimed to assess the current guidelines against other clinical variables as predictors of obstructive CAD in patients with UA referred for acute CAG.<h4>Methods</h4>From 2005 to 2012, all CAGs performed at the University Hospital of North Norway, the sole provider of CAG in the region, were recorded in a registry. We included 979 admissions of UA and retrospectively collected data regarding presenting clinical parameters from patient hospital records. Obstructive CAD was defined as ≥50% stenosis and considered prognostically significant if found in the left main st2018-01-01T00:00:00Z20182026-07-16T07:54:24.746Z2026-07-09T10:46:13.932ZS-EPMC62419683048798010.1136/openhrt-2018-000888