Left main compression syndrome caused by pulmonary hypertension due to peripheral pulmonary artery stenosis complicated with moyamoya disease

Q4 Medicine Journal of Cardiology Cases Pub Date : 2025-02-01 DOI:10.1016/j.jccase.2024.09.006

Sei Matsuo MD, Kazuyuki Ozaki MD, FJCC, Takeshi Kashimura MD, Yuji Matsuo MD, Tsugumi Takayama MD, Makoto Hoyano MD, Takao Yanagawa MD, Takayuki Inomata MD, FJCC

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Abstract

Left main compression syndrome (LMCS) is a disease in which the ostium of the left main coronary artery is compressed between a dilated pulmonary artery and the sinus of Valsalva associated with pulmonary hypertension (PH). The major etiology of LMCS is secondary PH due to congenital heart disease. However, no reports exist regarding LMCS caused by PH due to peripheral pulmonary artery stenosis complicated with moyamoya disease (MMD). We report a case of LMCS caused by PH due to peripheral pulmonary artery stenosis complicated with MMD in a 41-year-old woman who was treated with percutaneous coronary intervention.

Learning objective

Left main compression syndrome (LMCS) is a condition in which the main trunk of the left coronary artery is compressed between the dilated pulmonary artery and aorta due to pulmonary hypertension. This paper reports the first case of LMCS due to peripheral pulmonary artery stenosis complicated with moyamoya disease.

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