“…175 Furthermore, clinical evaluations may be misleading, because many patients are asymptomatic, 227 despite evidence from cardiac MRI studies of late myocardial enhancement that suggests that ≈30% of survivors have myocardial fibrosis or scarring and that ≈70% have perfusion deficits. 253 The diagnostic performance characteristics of noninvasive screening modalities, including stress echocardiography, ECG, and scintigraphy, to detect stress-induced ischemia are not as good as those of coronary angiography. 227 The sensitivity of new diagnostic tools, such as computed CT, magnetic resonance angiography, and coronary artery calcium scores, for detecting clinically important (>50%) stenosis as measured by angiography varies from 81% to 97% for men and from 76% to 98% for women, with specificity >77%.…”