A 68-year-old-woman with diabetes mellitus (DM) and hypertension suffered from exertional dyspnea and intermittent chest tightness for months. The symptoms got more frequent and severe. She received myocardial perfusion imaging, which demonstrate partial reversible perfusion defect in the anterior wall, revealing ischemic change and the possibility of left anterior descending (LAD) stenosis. She received dual-source CT (DSCT)
coronary angiography, which revealed 95% stenosis in mid LAD artery. Due to failure of medical treatment, she received catheterization coronary angiography, which showed 70% stenosis in proximal LAD. Comparing with
the results of catheterization coronary angiography, 201Tl myocardial perfusion SPECT showed better correlation than DSCT.