Anteriorly displaced right coronary artery in acute myocardial infarction: what should every cardiologist know

Area of Science:

• Cardiology
• Interventional Cardiology
• Cardiac Imaging

Background:

• Anomalous origin of the right coronary artery (RCA) and anterior displacement of the RCA occur in approximately 1% and 0.1% of adult patients, respectively.
• These variations are significant causes of incomplete coronary angiography and extended procedure durations.
• Identifying these anatomical variations is critical for effective diagnosis and treatment.

Observation:

• A case is presented where an anteriorly displaced RCA occlusion led to acute inferior-posterior-right ventricular myocardial infarction.
• The patient experienced complications including complete atrioventricular block and hypotension.
• Delayed reperfusion occurred due to the inability to initially image the anomalous RCA, necessitating fibrinolysis.

Findings:

• The study discusses common anatomical locations for ectopic RCAs.
• It proposes an algorithm for imaging ectopic RCAs when conventional catheters fail.
• The effective search area for ectopic RCAs extends beyond traditional boundaries, encompassing the anterior third of the right sinus and anterior half of the left sinus.

Implications:

• Accurate and timely imaging of anomalous coronary arteries is vital for reducing myocardial damage and improving patient outcomes.
• The suggested algorithm can aid interventional cardiologists in diagnosing and managing patients with challenging coronary anatomy.
• Understanding the broader anatomical search zones for ectopic RCAs can prevent diagnostic delays and optimize reperfusion strategies in acute myocardial infarction.