National registry data indicate that approximately 60% of patients referred for invasive coronary angiography (ICA) have normal coronary arteries (NCA) or nonobstructive coronary artery disease (CAD) [(1)][1]. Some have suggested… Click to show full abstract
National registry data indicate that approximately 60% of patients referred for invasive coronary angiography (ICA) have normal coronary arteries (NCA) or nonobstructive coronary artery disease (CAD) [(1)][1]. Some have suggested that the rather low prevalence of obstructive CAD may be due to
               
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