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Rates of no obstruction at angiography by sex and indication for angiography. Abbreviations: ACS, acute coronary syndrome; CAD, coronary artery disease; NSTEMI, non–ST‐segment elevation myocardial infarction; STEMI, ST‐segment elevation myocardial infarction; UA, unstable angina. “No obstruction” specifies < 50% stenosis in all epicardial vessels
