Discovery of a symptomatic left anomalous coronary artery from the opposite sinus and postoperative considerations

Area of Science:

• Cardiology
• Congenital Heart Disease

Background:

• Anomalous origin of coronary arteries (AoCA) is a rare congenital heart defect.
• AoCA can lead to significant cardiovascular events, including angina, myocardial ischemia, and sudden cardiac death (SCD).

Observation:

• A case study of an 18-year-old active duty soldier presenting with exertional chest pressure and syncope.
• Diagnostic findings revealed anomalous origin of the left main coronary artery (LMCA) from the right coronary cusp (RCC), with an interarterial course.
• The LMCA coursed between the great vessels before adopting a septal pathway between the left and right ventricular outflow tracts (LVOT/RVOT).

Findings:

• Despite the complex coronary anatomy, the patient's condition was not immediately life-threatening from a sudden death perspective.
• The patient experienced debilitating symptoms, including exertional chest pressure and syncope, impacting quality of life.

Implications:

• Surgical correction of complex AoCA can be challenging, potentially limiting traditional benefits.
• This case highlights that even seemingly benign AoCA from a SCD standpoint can result in significant morbidity.
• Further research into optimal management strategies for complex AoCA is warranted to improve patient outcomes.