title: Left main coronary artery spasm in a hyperthyroid patient with suspected acute coronary syndrome.
abstract: The left main coronary artery (LMCA) vasospasm is rare. We report a suspected acute coronary syndrome patient with hyperthyroidism who had LMCA vasospasm. Coronary angiogram showed 60% stenosis at LMCA. After administering nitroglycerin, re-angiography showed no significant stenosis. Then we evaluated LMCA lesion using intravascular ultrasound (IVUS) showing no significant stenosis. We considered that it was a LMCA vasospasm and may be assosiated with hyperthyroid state. After anti-thyroid and anti-spasm treatment, chest pain subsided. In conclusion, hyperthyroidism induced coronary hypersensitivity may contribute to LMCA vasospasm as seen in this case. IVUS may be useful to identify coronary vasospasm.
authors.affiliation: De-zhao Wang, Department of Cardiology, Tiantan Hospital, Capital Medical University, Beijing, China.
authors.forename: De-Zhao
authors.initials: DZ
authors.lastname: Wang
authors.affiliation: Hong-yu Hu, Department of Cardiology, Tiantan Hospital, Capital Medical University, Beijing, China.
authors.forename: Hong-Yu
authors.initials: HY
authors.lastname: Hu
authors.affiliation: Qiang Fu, Department of Cardiology, Tiantan Hospital, Capital Medical University, Beijing, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Fu
authors.affiliation: Wei Chen, Department of Cardiology, Tiantan Hospital, Capital Medical University, Beijing, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.affiliation: Xu Hua, Department of Cardiology, Tiantan Hospital, Capital Medical University, Beijing, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Hua
authors.affiliation: Bu-xing Chen, Department of Cardiology, Tiantan Hospital, Capital Medical University, Beijing, China.
authors.forename: Bu-Xing
authors.initials: BX
authors.lastname: Chen
keywords: Coronary angiography; Hyperthyroidism; Intravascular ultrasound; Left main coronary artery; Vasospasm