Abstract
Single coronary artery (SCA) is defined as an isolated coronary artery
that arises from a single coronary ostium and provides blood supply to
the entire myocardium. At present, the absence of the right coronary
artery is more common in SCA and the absence of the left coronary artery
is rare. We report a case of a middle-aged man with congenital left
coronary artery absence. The patient underwent coronary angiography
after completing relevant examinations on admission, the results showed
that the coronary artery blood supply was dominant in the right coronary
artery; the right coronary artery was compensatively thickened and long,
the part of the left coronary artery that functions as the anterior
descending branch opens at the beginning of the right coronary artery
and the blood vessels were small. The patient was given symptomatic
supportive treatment during the hospitalization period and was
discharged from the hospital. The patient’s condition was stable during
the follow-up. This case demonstrates that although congenital left
coronary artery absence is a rare disease, correct diagnosis,
appropriate treatment and patient education play a vital role in the
treatment of these patients.