The "hinge-twist" technique for anomalous origin of the left coronary artery

Area of Science:

• Cardiology
• Congenital Heart Disease
• Pediatric Cardiology

Background:

• Congenital anomalies of the coronary arteries are rare but can lead to significant cardiovascular events.
• Anomalous origin of the left main coronary artery (LMCA) from the right sinus of Valsalva is a potentially life-threatening condition.
• Early diagnosis and appropriate management are crucial for preventing adverse outcomes.

Observation:

• A 4-year-old asymptomatic boy presented with an incidental cardiac murmur.
• Transthoracic echocardiography revealed the anomalous origin of the LMCA from the right sinus of Valsalva.
• Further confirmation was obtained through cardiac catheterization and computed tomographic angiography.

Findings:

• The LMCA followed a short interarterial course between the aorta and main pulmonary artery.
• The anomalous LMCA supplied the anterior descending and circumflex coronary arteries.
• No clear intramural segment or ostial stenosis was identified on imaging.
• Stress testing results were normal, despite the anatomical abnormality.

Implications:

• The potential for sudden cardiac death necessitated surgical intervention in this pediatric patient.
• The "hinge-twist" technique was chosen to address the anomalous LMCA origin, avoiding complications associated with other surgical methods.
• This case highlights the importance of echocardiography in detecting coronary artery anomalies and the consideration of surgical repair even in asymptomatic individuals at risk.