The purpose of this study is to compare the extent of coronary vessel stenosis between coronary spasm-induced angina attacks (named vasospastic angina, VSA) patients and health volunteers by multi-detector computed tomography angiography (MDCTA), and to evaluate the diagnostic efficacy of MDCTA in patients with VSA.
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Characteristics of coronary lesion
Timeframe: CAG will be performed after multidetector coronary CT, an expected average of 4 weeks.