摘要目的在存在和缺乏静脉内硝酸酯滴注情况下,评估双源冠状动脉CTA检测冠状动脉痉挛性心绞痛的可行性。方法 20例临床高度怀疑可能为血管痉挛性心绞痛病人被纳入本研究。所有被试者在清晨不使用血管扩张药的前提下进行基线冠状动脉CTA检查,接着进行冠状动脉造影及麦角新碱激发试验。3 d内,所有被试者进行重复冠状动脉CTA,同时不间断静脉输注硝酸酯。冠状动脉CTA检测到的血管痉挛性心绞痛被定义为显著的狭窄(≥50%),具有阴性重塑,主要冠状动脉不存在明确斑块或弥漫性直径减小 Abstract Objective To evaluate the feasibility of double-source coronary CTA in detecting coronary spastic angina in the presence and absence of intravenous nitrate instillation. Methods Twenty patients with high clinical suspicion of vasospasm angina were included in this study. All subjects underwent baseline coronary CTA with no vasodilator in the morning, followed by coronary angiography and ergometrine challenge. Within 3 days, all subjects underwent repeat coronary CTA with continuous intravenous nitrates. Vasospastic angina detected by coronary CTA was defined as significant stenosis (≥50%) with negative remodeling, absence of definite plaque in the main coronary arteries or a decrease in diffuse diameter