Objective To observe the exercise single photon emission computed tomograpby (SPECT)myocardial perfusion imaging of patients with myocardial bridge and assess the association between myocardial ischemia and extent of myocardial systolic compression.Methods Seventeen patients with myocardial bridge diagnosed by coronary angiogram were included and underwent exercise SPECT myocardial perfusion imaging.Results Abnormal SPECT perfusion imaging was evidenced in 12 out of 17 patients with myocardial bridge(2 out of 6 patients with systolic compression induced stenosis＜50%,3 out of 4 patients with systolic compression induced stenosis between 50%-75%and 7 out of 7 patients with the systolic compression induced stenosis between 75%-100%).Conclusion Exercise stress SPECT myocardial perfusion imaging could detect myocardial ischemia in patients with myocardial bridge and abnormal perfusion is positively related to the extent of systolic compression induced stenosis.%目的 总结和分析冠状动脉心肌桥患者99Tcm-MIBI运动负荷心肌血流灌注断层显像的特点.方法 回顾2003年至2009年经冠状动脉造影证实的冠状动脉心肌桥患者17例,分析其~(99)Tc~m-MIBI运动负荷心肌血流灌注断层显像放射性分布特点.结果 17例心肌桥患者中有12例患者出现异常心肌血流灌注断层影像.6例收缩期壁冠状动脉受压狭窄＜50%的患者中有2例患者出现异常心肌血流灌注断层影像,表现为可逆性缺损和反向再分布.4例收缩期壁冠状动脉受压狭窄50%～75%的患者中有3例患者出现异常心肌血流灌注断层影像,表现为可逆性缺损、部分可逆性缺损、固定缺损、反向再分布.7例收缩期壁冠状动脉受压狭窄75%～100%的患者心肌血流灌注断层影像异常率为100%,表现为可逆性缺损、部分可逆性缺损、固定缺损、反向再分布.结论 冠状动脉心肌桥患者可以导致心肌血流灌注断层显像异常.收缩期壁冠状动脉受压75%～100%心肌桥患者均出现异常心肌血流灌注断层显像.
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