Talk:Cardiovascular System - Tricuspid Atresia

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Cite this page: Hill, M.A. (2021, June 20) Embryology Cardiovascular System - Tricuspid Atresia. Retrieved from


Isolated Left Subclavian Artery, Complete Atrioventricular Block, and Tricuspid Atresia in a Neonate

Tex Heart Inst J. 2016 Dec 1;43(6):546-549. doi: 10.14503/THIJ-15-5692. eCollection 2016.

Chaturvedi K, Prasad D, Ashwath R, Strainic JP, Snyder CS.


Isolated left subclavian artery is one of the rarer aortic arch anomalies. It has been associated with other congenital heart diseases, typically tetralogy of Fallot, double-outlet right ventricle, and atrial and ventricular septal defects. Its significant clinical implications include a left-to-right shunt from the vertebrobasilar system, which causes pulmonary overcirculation and subclavian steal. We present an unusual case of a premature infant who was diagnosed prenatally with congenital complete atrioventricular block and tricuspid atresia and was found to have an isolated left subclavian artery postnatally. The patient underwent implantation of a permanent single-chamber epicardial pacing system. To our knowledge, this combination of lesions has not been reported-and in our case, it influenced our surgical planning. KEYWORDS: Abnormalities, multiple/diagnosis/surgery; aortic arch syndromes/complications; atrioventricular block/complications/diagnosis/etiology; ductus arteriosus/complications; heart defects, congenital/complications/surgery; infant, newborn; prenatal diagnosis; subclavian artery/abnormalities; subclavian steal syndrome/diagnosis/etiology/pathology; tricuspid atresia/diagnosis

PMID 28100981 PMCID: PMC5179167 DOI: 10.14503/THIJ-15-5692