Contrast echo-a simple diagnostic tool for a coronary artery fistula

Area of Science:

• Cardiology
• Medical Imaging
• Diagnostic Techniques

Background:

• Coronary artery fistulas are abnormal connections between coronary arteries and heart chambers or great vessels.
• Traditional diagnostic methods like coronary angiography and CT angiography are invasive or involve radiation exposure.
• Echocardiography can detect large fistulas but often struggles with confirmation.

Purpose of the Study:

• To introduce and evaluate a new, non-invasive diagnostic approach for coronary artery fistulas.
• To utilize contrast-enhanced transthoracic echocardiography for improved fistula detection and characterization.

Main Methods:

• Transthoracic echocardiography was performed on a patient presenting with dyspnea.
• A contrast agent was infused intravenously to visualize blood flow.
• Aortic CT angiography was used for definitive anatomical confirmation.

Main Results:

• Echocardiography revealed suspicious turbulent flow in the main pulmonary artery.
• Contrast-enhanced echocardiography showed characteristic diastolic whitish flow in the pulmonary artery.
• Aortic CT confirmed two large right coronary artery fistulas directly into the main pulmonary artery.

Conclusions:

• Contrast-enhanced transthoracic echocardiography offers a simple and effective method for diagnosing coronary artery fistulas.
• The typical finding of diastolic whitish flow in the pulmonary artery aids in diagnosis.
• This technique provides a valuable non-invasive alternative for evaluating suspected coronary artery fistulas.