Unstable angina with coronary to pulmonary artery fistulae

Area of Science:

• Cardiology
• Cardiovascular Surgery
• Interventional Cardiology

Background:

• Coronary artery fistulae (CAF) are rare anomalies.
• Their presentation with chest pain can mimic other cardiac conditions.
• Understanding their clinical significance is crucial for diagnosis and management.

Observation:

• Three patients with chest pain underwent cardiac catheterization.
• All three were diagnosed with fistulae between the left anterior descending coronary artery and the main pulmonary artery.
• Two patients had concomitant coronary artery disease.

Findings:

• One patient with unstable angina and coronary artery disease was treated with percutaneous transluminal coronary angioplasty.
• Another patient with unstable angina underwent successful bypass grafting and fistula ligation.
• The third patient with atypical chest pain improved after reassurance, with the fistula deemed unrelated to symptoms.

Implications:

• Coronary artery fistulae may not always be the primary cause of chest pain.
• A coronary steal phenomenon is a potential contributing factor in patients with fistulae and coronary artery disease.
• Management strategies should consider the fistula's relationship to the patient's presenting complaint and underlying coronary health.