Transcatheter Coil Embolization of Single Coronary Artery Fistula Using the Occlusion Test

Area of Science:

• Cardiology
• Pediatric Cardiology
• Interventional Cardiology

Background:

• Coronary artery fistulas (CAF) can pose risks during embolization, especially in complex cases like single coronary artery anomalies.
• A pediatric patient presented with a significant coronary artery fistula to the right ventricle, causing coronary steal and narrowing the left coronary artery.

Observation:

• Hemodynamic and electrocardiographic monitoring were performed during a 10-minute occlusion test of the proximal coronary artery fistula.
• The patient had a single coronary artery anomaly with a large, porous fistula, increasing potential embolization risks.

Findings:

• The occlusion test revealed no significant changes in pulmonary arterial pressure or aortic blood pressure.
• No adverse events such as bradycardia, atrioventricular block, or ST changes were observed during the test.
• These findings confirmed the safety of proceeding with coil embolization treatment.

Implications:

• The occlusion test is a valuable tool for assessing the safety of embolization in complex coronary artery fistula cases.
• This pre-procedural evaluation can identify patients at risk for myocardial ischemia and conduction system disorders.
• It enables safer interventional planning for pediatric patients with single coronary arteries and distal fistulas.