так тоже, по-моему, можно...

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Note added at 5 час (2008-04-30 16:15:29 GMT)
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Fig. 274. Semilunar cusps of aortic valve. Aorta and left ventricle are cut and unfolded.
1-semilunar cusps; 2-aorta (is cut and unfolded); 3-**opening of left coronary artery**; 4-nodule of semilunar cusp; 5-cavity of left ventricle; 6-wall of left ventricle; 7-**opening of left coronary artery**.
http://www.bulanoff.ru/anot/24.htm

"...opening of the left coronary artery..."
http://medind.nic.in/ibq/t07/i1/ibqt07i1p28.pdf

"...with the ostium or opening of the left coronary artery"
http://209.85.135.104/search?q=cache:nkEtzlRVC3AJ:www.wipo.i...

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Note added at 5 час (2008-04-30 16:18:27 GMT)
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"A piece of pulmonary arterial wall including the **opening of the anomalous left coronary artery** (ALCA) was isolated..."
http://www.ncbi.nlm.nih.gov/pubmed/1154386?ordinalpos=39&ito...

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Note added at 5 час (2008-04-30 16:25:45 GMT)
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"The ostium of the right coronary artery (RCA) was located in the left aortic sinus just in front of the **opening of the left coronary artery**"
http://www.ncbi.nlm.nih.gov/pubmed/9580119?ordinalpos=24&ito...