Key result
Overlapping atriocaval anatomy complicates differentiating sinus venosus defects from cavopulmonary windows.
Why the study?
Differentiating sinus venosus defect with partial anomalous pulmonary venous return from a cavopulmonary window is challenging due to overlapping atriocaval anatomy and imaging limitations.
Case Report
Highlights the diagnostic challenge of differentiating superior sinus venosus defect with PAPVR from a cavopulmonary window, particularly when limited by overlapping anatomy or echocardiography quality.
Advanced imaging may clarify SVD-PAPVR versus cavopulmonary window overlap; leaves open standardized protocols for device patients.
Partial anomalous pulmonary venous return (PAPVR) is an uncommon congenital anomaly that is most frequently associated with a superior sinus venosus defect (SVD).1,2 Differentiating SVD with PAPVR from a cavopulmonary window within the sinus venosus spectrum may be challenging because of overlapping atriocaval anatomy, particularly when transthoracic echocardiography (TTE) is limited or intracardiac devices complicate image interpretation.3
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Vu et al. (2026) conducted a case report in Sinus venosus defect with partial anomalous pulmonary venous return. Differentiating a sinus venosus defect with partial anomalous pulmonary venous return from a cavopulmonary window is challenging due to overlapping atriocaval anatomy.
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