• Edgar Kiss, Sarah Chehab, Ingrid Moreno Duarte, Umar Khan, David Schindel, Samir Pandya, Sana Ullah, Courtney Ochoa, and Luis M Zabala.
• Division of Pediatric Anesthesiology, Children's Health System of Texas, Dallas, TX, USA.
• Paediatr Anaesth. 2021 Nov 1; 31 (11): 1255-1258.

AbstractClinically significant extrauterine twin-twin transfusion syndrome in conjoined twins is rare and carries a high risk of perinatal mortality. The ensuing postnatal imbalance in circulation across connecting vessels results in hypovolemia in the donor and hypervolemia in the recipient. Data on management and treatment are sparse especially in the setting of a single ventricle congenital heart defect. We present a case of a pair of omphalopagus conjoined twins, one with a single ventricle physiology (Twin B), who developed twin-twin transfusion syndrome shortly after birth. The resulting pathophysiology in the setting of a single ventricle congenital heart defect created added layers of complexity to their management and expedited surgical separation. Shunting from Twin B to Twin A-with an anatomically normal heart-resulted in mal-perfusion and rapid deterioration jeopardizing the health of both twins. In the preoperative course, steps taken to medically optimize the twins prior to surgery and the anesthetic considerations are detailed in this report.© 2021 John Wiley & Sons Ltd.

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