Optical Coherence Tomography Findings in a Case of Acute Coronary Syndrome Caused by Coronary Vasospasm

Nobuaki Kobayashi; Masamichi Takano; Noritake Hata; Masanori Yamamoto; Takuro Shinada; Yasuhiro Takahashi; Kazunori Tomita; Mitsunobu Kitamura; Kyoichi Mizuno

doi:10.1536/ihj.51.291

Case Reports

Optical Coherence Tomography Findings in a Case of Acute Coronary Syndrome Caused by Coronary Vasospasm

Nobuaki Kobayashi, Masamichi Takano, Noritake Hata, Masanori Yamamoto, Takuro Shinada, Yasuhiro Takahashi, Kazunori Tomita, Mitsunobu Kitamura, Kyoichi Mizuno

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Keywords: Coronary vasospasm, Acute coronary syndrome, Optical coherence tomography

JOURNAL FREE ACCESS

2010 Volume 51 Issue 4 Pages 291-292

DOI https://doi.org/10.1536/ihj.51.291

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Abstract

Culprit lesions of acute coronary syndrome (ACS) were observed by intravascular optical coherence tomography (OCT). OCT images revealed diffuse intimal thickening, reduced lumen area with vascular contraction, and thrombus formation. No OCT images of atherosclerotic plaque disruption were found. Vascular contraction disappeared and the lumen was dilated after intracoronary injection of nitroglycerin. The main mechanism of ACS in this case was therefore considered to be coronary vasospasm. OCT may be useful for evaluating the mechanism of ACS.

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