ArticleRadiology case reports2026
Double superior vena cava and anomalous left atrial drainage of persistent left SVC: A case report.
Article in Radiology case reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Persistent left superior vena cava (PLSVC) is an uncommon developmental variation of the thoracic venous system, sometimes accompanied by a duplicated superior vena cava (SVC). While often asymptomatic when draining into the right atrium, drainage toward the left atrium could lead to a right-to-left shunt and potential compromise of whole-body oxygen delivery. This report describes a 48-year-old male patient with hypertension and chronic tobacco use who was evaluated for dyspnea and leg edema. Imaging revealed a double SVC, where the left-sided vessel connected directly to the left atrium. Despite this anomaly, the patient exhibited no significant hypoxemia or cyanosis, likely due to long-term compensatory mechanisms. This report underscores the need to consider vascular anomalies in imaging interpretation, particularly when findings are incidental. It also underscores the role of contrast-enhanced CT in identifying rare anatomical variants and the potential for such anomalies to remain clinically silent despite physiological significance.
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