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Published on: August 26, 2025
Myocardial ischemia secondary to a large coronary-pulmonary fistula--a case report
Ernesto Umaña1, Clara V Massey, Jack A Painter
1Division of Cardiology, University of South Alabama College of Medicine, Mobile 36617, USA.
Insights
Rare coronary-pulmonary fistulas, typically from the left anterior descending or right coronary arteries, can involve the circumflex artery. This case highlights a large fistula from the circumflex artery to the pulmonary artery.
Area of Science:
- Cardiology
- Vascular Surgery
Background:
- Coronary-pulmonary fistulas are uncommon vascular anomalies.
- Most fistulas originate from the left anterior descending or right coronary arteries.
- The circumflex coronary artery is an infrequent source of these fistulas.
Observation:
- A 62-year-old female presented with chest pain and myocardial ischemia.
- Cardiac catheterization excluded obstructive coronary artery disease.
- A large coronary pulmonary fistula was identified originating from the left circumflex coronary artery and draining into the left pulmonary artery.
Findings:
- This case represents a rare instance of a coronary-pulmonary fistula involving the circumflex coronary artery.
- The fistula was large and symptomatic, presenting as myocardial ischemia.
- Management strategies for such rare conditions remain debated.
Implications:
- This case underscores the importance of considering rare coronary anomalies in patients with unexplained ischemic symptoms.
- Accurate diagnosis via cardiac catheterization is crucial for appropriate management.
- Further research into the optimal treatment of coronary-pulmonary fistulas is warranted.
Abstract:
Coronary-pulmonary fistulas are rare. The majority of these fistulas arise from the left anterior descending or the right coronary arteries; the circumflex coronary artery is rarely involved. The majority of patients are asymptomatic, but heart failure, angina, myocardial infarction, endocarditis, and dyspnea have rarely been reported. The management is controversial and recommendations are based on anecdotal cases or very small retrospective series. A case of a 62-year-old female is reported who presented with chest pain and was found to have myocardial ischemia on SPECT sestamibi. Cardiac catheterization revealed no obstructive coronary artery disease and a large coronary pulmonary fistula communicating from the left circumflex coronary artery to the left pulmonary artery.
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