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Congenital coronary arteriovenous fistula — Clinical Guidelines

Overview

Congenital coronary arteriovenous fistulas (CAVFs) are rare anomalies characterized by abnormal connections between coronary arteries and veins or other cardiac structures, often leading to hemodynamic disturbances and potential complications such as myocardial ischemia 1.

Diagnosis

Clinical Presentation: Symptoms may include chest pain, dyspnea, and signs of heart failure; asymptomatic cases are also common 1 12.

Imaging Techniques:

- Echocardiography: Two-dimensional echocardiography (2DE) and Doppler echocardiography can suggest CAVF, identifying dilated coronary arteries and abnormal fistulous channels 5 10. - Coronary Angiography: Gold standard for definitive diagnosis, visualizing the fistula anatomy 1 5 12. - Nuclear Imaging: Stress 99mTc-MIBI SPECT can indicate myocardial ischemia suggestive of CAVF 1. - CT and MRI: Useful for detailed anatomical assessment, particularly in complex cases 8 9.

Management

First-Line Treatment:

- Transcatheter Closure: Preferred approach for most cases, utilizing devices like Amplatzer muscular VSD device, Amplatzer Duct Occluder, and other occluder devices 2 3.

Adjunctive Treatments:

- Surgical Ligation: Considered for large fistulas or when transcatheter closure is not feasible 12. - Endovascular Procedures: In specific cases, balloon occlusion or embolization techniques may be employed 6 11.

Special Populations

Pediatrics: Transcatheter closure is effective even in neonates and young children, with staged approaches for larger fistulas 2 3.

Comorbidities: Patients with prior conditions like Kawasaki disease may present atypically, requiring careful monitoring and timely intervention 1.

Key Recommendations

Utilize Coronary Angiography for Definitive Diagnosis: Essential for visualizing the anatomy of CAVF 1 5 12 (Evidence: Strong).

Transcatheter Closure is the Preferred Management Approach: Effective and minimally invasive, suitable across age groups 2 3 (Evidence: Moderate).

Consider Surgical Ligation for Large or Complex Fistulas: When transcatheter methods are not feasible or effective 12 (Evidence: Expert opinion).

References

1 Lee ML, Peng JW, Hung GU. Catheter-based management for the congenital coronary arteriovenous fistula indicated by the stress 99mTc-MIBI SPECT. International journal of cardiology 2008. link 2 Holzer R, Waller BR, Kahana M, Hijazi ZM. Percutaneous closure of a giant coronary arteriovenous fistula using multiple devices in a 12-day-old neonate. Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions 2003. link 3 Hakim F, Madani A, Goussous Y, Cao QL, Hijazi ZM. Transcatheter closure of a large coronary arteriovenous fistula using the new Amplatzer Duct Occluder. Catheterization and cardiovascular diagnosis 1998. link1097-0304(199810)45:2<155::aid-ccd11>3.0.co;2-k) 4 Said SA, el Gamal MI, van der Werf T. Coronary arteriovenous fistulas: collective review and management of six new cases--changing etiology, presentation, and treatment strategy. Clinical cardiology 1997. link 5 Nair T, Joy MV, Subramanyan R, Venkitachalam CG, Balakrishnan KG. Two-dimensional and Doppler echocardiographic study of coronary arteriovenous fistulas. Indian heart journal 1990. link 6 Halbach VV, Higashida RT, Hieshima GB, Hardin CW, Dowd CF, Barnwell SL. Transarterial occlusion of solitary intracerebral arteriovenous fistulas. AJNR. American journal of neuroradiology 1989. link 7 Widlus DM, Murray RR, White RI, Osterman FA, Schreiber ER, Satre RW et al.. Congenital arteriovenous malformations: tailored embolotherapy. Radiology 1988. link 8 Vandenbossche JL, Felice H, Grivegnée A, Englert M. Noninvasive imaging of left coronary arteriovenous fistula. Chest 1988. link 9 Slater J, Lighty GW, Winer HE, Kahn ML, Kronzon I, Isom OW. Doppler echocardiography and computed tomography in diagnosis of left coronary arteriovenous fistula. Journal of the American College of Cardiology 1984. link80151-5) 10 Miyatake K, Okamoto M, Kinoshita N, Fusejima K, Sakakibara H, Nimura Y. Doppler echocardiographic features of coronary arteriovenous fistula. Complementary roles of cross sectional echocardiography and the Doppler technique. British heart journal 1984. link 11 Kaufman SL, Kumar AA, Roland JM, Harrington DP, Barth KH, Haller JA et al.. Transcatheter embolization in the management of congenital arteriovenous malformations. Radiology 1980. link 12 Liberthson RR, Sagar K, Berkoben JP, Weintraub RM, Levine FH. Congenital coronary arteriovenous fistula. Report of 13 patients, review of the literature and delineation of management. Circulation 1979. link

Congenital coronary arteriovenous fistula