Post-ECMO decannulation right atrial fibrin sheath.

RA Right atrium, IAS Interatrial septum, PAC Pulmonary artery catheter Declarations Conflicts of interest On behalf of all authors, the corresponding author states that there is no conflict of interest. RA: Right atrium; IAS: Interatrial septum; PAC: Pulmonary artery catheter Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. A tubular fibrin sheath in his right atrium (RA) extending to the superior vena cava to RA junction, was found due to the presence of his ECMO drainage cannula (Fig. [Extracted from the article]