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Doppler echocardiographic features of coronary artery fistula: report of 8 cases
M M Barbosa1, T Katina, H G Oliveira
1Ecocenter, Echocardiography Laboratory of Hospitals Vera Cruz and Socor, Belo Horizonte, MG, Brazil.
Insights
Coronary artery fistulas, rare congenital anomalies, are usually diagnosed noninvasively using Doppler echocardiography. This technique effectively identifies dilated coronary arteries and their drainage pathways into cardiac chambers or the pulmonary artery.
Area of Science:
- Cardiology
- Medical Imaging
Background:
- Coronary artery fistula is a rare congenital anomaly.
- It involves abnormal drainage of a coronary artery into a cardiac chamber, pulmonary artery, or other structure.
Purpose of the Study:
- To describe the features of coronary artery fistulas diagnosed noninvasively.
- To evaluate the utility of Doppler echocardiography with color flow mapping in diagnosing these anomalies.
Main Methods:
- Prospective diagnosis of 8 patients with coronary artery fistulas.
- Utilized 2-dimensional echocardiography and Doppler echocardiography with color flow mapping.
Main Results:
- Right coronary artery involved in 4 cases, left in 4.
- Fistulas drained to the right ventricle (4), right atrium (2), and pulmonary artery (2).
- One patient with dual fistulas to the pulmonary artery had only one diagnosed noninvasively, highlighting potential detection challenges.
Conclusions:
- 2D echocardiography with color flow mapping is generally effective for diagnosing coronary artery fistulas.
- Fistulas draining into the pulmonary artery may be more challenging to detect due to normal coronary artery size and small shunts.
Abstract:
Coronary artery fistula is a rare congenital anomaly in which the involved coronary artery empties into a cardiac chamber, pulmonary artery, or other structure. Its diagnosis can be made noninvasively by finding a dilated coronary artery by 2-dimensional (2D) echocardiography, and its drainage can be detected by color flow mapping. We describe features of coronary artery fistulas in 8 patients whose condition was prospectively diagnosed by Doppler echocardiography with color flow mapping. The right coronary artery was involved in 4 cases and the left coronary artery in 4. Four fistulas drained to the right ventricle, 2 to the right atrium, and 2 to the pulmonary artery. In 1 patient who had left and right coronary fistulas to the pulmonary artery, only the first was diagnosed noninvasively. The diagnosis of coronary fistulas can usually be made by 2D echocardiography with color flow mapping. However, fistulas to the pulmonary artery may be more difficult to detect by 2D echocardiography because the coronary artery may be of normal size and the shunt small.
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