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Updated: Jul 14, 2026

Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function
Published on: March 15, 2022
Percutaneous coronary intervention in single coronary artery in a patient with high-risk unstable angina
Hugo Alexandre Ross Yokoyama1, Caio Mário de Almeida Pessoa, Fábio Cardoso de Carvalho
1Hospital Estadual de Bauru, Faculdade de Medicina de Botucatu, UNESP, Bauru, SP, Brazil. haross@cardiol.br
Insights
This case report details successful coronary angioplasty with stent implantation for high-risk unstable angina in a patient with a rare single coronary artery anomaly. Anatomical assessment is crucial for preventing complications during percutaneous coronary intervention.
Area of Science:
- Cardiology
- Interventional Cardiology
- Anatomical Variations
Background:
- Unstable angina requires prompt intervention.
- Coronary artery anomalies present unique challenges in percutaneous coronary intervention (PCI).
- Single coronary artery anomalies are rare, necessitating careful pre-procedural planning.
Observation:
- A patient presented with high-risk unstable angina.
- The patient had a rare single coronary artery originating from the right coronary sinus.
- The left anterior descending and circumflex arteries arose separately from the proximal right coronary artery.
Findings:
- Successful coronary angioplasty with stent implantation was performed in the right coronary artery.
- The procedure was technically feasible despite the complex coronary anatomy.
- No immediate complications were reported during the intervention.
Implications:
- This case highlights the importance of detailed coronary artery anatomical assessment before PCI.
- Accurate anatomical understanding is vital for safe and effective treatment of coronary artery disease in anomalous vessels.
- Further case reports may improve understanding and management strategies for rare coronary anomalies.
Abstract:
In the present case, we report the performance of coronary angioplasty with stent implantation in the right coronary artery of a patient with high-risk unstable angina and single coronary artery originating from the right coronary sinus. The anterior descending and circumflex arteries originated separately from the proximal third of the right coronary artery. This is a rare coronary anomaly and few reports of percutaneous coronary intervention are found in the literature. This case illustrates the need for a detailed anatomical assessment of the course of the coronary arteries prior to the performance of a percutaneous transluminal angioplasty, with the purpose of preventing complications.
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