Transient Severe Mitral Regurgitation Complicating Myocardial Stunning due to Coronary Vasospasm

Hitoki INOUE; Masashi HORIMOTO; Satomi HAMASAKAI; Takashi TAKENAKA; Keiichi IGARASHI; Setsuya MIYATA

doi:10.2169/internalmedicine.38.660

Hitoki INOUE, Masashi HORIMOTO, Satomi HAMASAKAI, Takashi TAKENAKA, Keiichi IGARASHI, Setsuya MIYATA

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Keywords: transient wall motion abnormality, incomplete mitral leaflet closure, papillary muscle, coronary spasm

JOURNAL FREE ACCESS

1999 Volume 38 Issue 8 Pages 660-662

DOI https://doi.org/10.2169/internalmedicine.38.660

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Abstract

As in papillary muscle dysfunction complicating mitral prolapse, dyskinesis of the left ventricular wall underlying the papillary muscles has been shown to cause mitral regurgitation following myocardial infarction. Myocardial stunning has been experimentally evidenced to cause mitral regurgitation due to a wall motion abnormality, but it has not yet been clinically defined. We report a clinical case of transient severe mitral regurgitation complicating myocardial stunning caused by coronary vasospasm. Transient wall motion abnormality beneath the anterolateral papillary muscle was considered to be responsible for the mitral regurgitation.
(Internal Medicine 38: 660-662, 1999)

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