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1 results

  • Veno-venous bridges: the forerunners of the sinus venosus defect

  • Ryan J. Butts, Andrew M. Crean, Anthony M. Hlavacek, Diane E. Spicer, Andrew C. Cook, Erwin N. Oechslin, Robert H. Anderson
  • Journal:
    Cardiology in the Young / Volume 21 / Issue 6 / 28 October 2011
    Published online by Cambridge University Press:
    24 May 2011, pp. 623-630
  • Background

    Differentiation of the so-called sinus venosus defect from other defects permitting shunting between the atrial chambers remains problematic. The lesion is not a true septal defect, and current theories to explain the existence of the sinus venosus defect fall short. The presence of persistent systemic to pulmonary venous connections has been proposed to explain the existence of the sinus venosus defect.

    Methods

    Clinical histories and radiological findings of six patients are reviewed. Three patients have veno-venous bridges, two have partial anomalous pulmonary venous connections, and one patient has a sinus venosus defect. The clinical information is reviewed, along with current developmental and morphological considerations.

    Discussion

    We provide radiographic, developmental, and morphological evidence to support the theory that a so-called sinus venosus defect is the consequence of persistence of foetal systemic to pulmonary veno-venous bridges, rather than of deficiencies in atrial septation.