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          "en" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Transthoracic echocardiogram&#44; parasternal short-axis view&#44; with color Doppler applied to the course of the left main&#47;anterior descending artery&#44; showing multiple areas of turbulent flow corresponding to branching of the fistula at this point&#46;</p>"
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Journal Information
Vol. 33. Issue 10.
Pages 655-656 (October 2014)
Visits
8674
Vol. 33. Issue 10.
Pages 655-656 (October 2014)
Image in Cardiology
Open Access
Transthoracic echocardiography in the diagnosis of coronary fistula
O ecocardiograma transtorácico no diagnóstico de uma fístula coronária
Visits
8674
Inês Almeida
Corresponding author
inesalm@gmail.com

Corresponding author.
, Francisca Caetano, Joana Trigo, Paula Mota, António Leitão Marques
Serviço de Cardiologia, Centro Hospitalar e Universitário de Coimbra, Hospital Geral, Coimbra, Portugal
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Case report

Coronary fistulas are rare malformations with an estimated incidence of <1% in angiographic studies. They are usually diagnosed as incidental findings on coronary angiography. Detection by echocardiography is rarely reported; the most frequent finding is right chamber dilatation, as in most cases the fistula drains directly into the right heart.

A 66-year-old woman with permanent atrial fibrillation was admitted for fatigue on moderate exertion. On physical examination, a systolic-diastolic murmur was detected at the left sternal border. She had previously undergone transthoracic echocardiography, which showed normal-sized cardiac chambers, good biventricular function and no significant valve disease. Coronary angiography revealed no angiographic lesions but identified a large coronary fistula arising from the proximal segment of the anterior descending artery and draining into the pulmonary artery (Figure 1), causing a left-to-right shunt.

Figure 1.

Angiographic image of the fistula (yellow arrow) arising from the proximal segment of the anterior descending artery and draining into the pulmonary artery. Left: right oblique cranial view; right: lateral view.

(0.09MB).

Further echocardiographic assessment in parasternal view documented dilatation of the pulmonary artery trunk (34 mm) and normal-sized right chambers. Doppler echocardiography identified continuous laminar flow, mainly in diastole, peak velocity 0.1 m/s (Figure 2), corresponding to the site of coronary fistula drainage. Areas of turbulent flow were seen along the course of the anterior descending artery, corresponding to branching of the fistula at this point (Figure 3). Pulmonary artery pressure was estimated at 28 mmHg. No other congenital defects were detected.

Figure 2.

Transthoracic echocardiogram, parasternal short-axis view. Left: color Doppler showing laminar flow draining into the proximal portion of the pulmonary artery trunk (yellow arrow), as well as slight pulmonary regurgitation; right: continuous Doppler revealing the flow to be systolic-diastolic (mainly diastolic), with peak velocity of 1.0 m/s.

(0.11MB).
Figure 3.

Transthoracic echocardiogram, parasternal short-axis view, with color Doppler applied to the course of the left main/anterior descending artery, showing multiple areas of turbulent flow corresponding to branching of the fistula at this point.

(0.09MB).

Since the patient was symptomatic, it was decided to perform percutaneous closure, but this was unsuccessful and she subsequently underwent surgical ligation of the fistula.

Ethical disclosuresProtection of human and animal subjects

The authors declare that no experiments were performed on humans or animals for this study.

Confidentiality of data

The authors declare that no patient data appear in this article.

Right to privacy and informed consent

The authors declare that no patient data appear in this article.

Conflicts of interest

The authors have no conflicts of interest to declare.

Please cite this article as: Almeida I, Caetano F, Trigo J, et al. O ecocardiograma transtorácico no diagnóstico de uma fístula coronária. Rev Port Cardiol. 2014;33:655–656.

Copyright © 2013. Sociedade Portuguesa de Cardiologia
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