CT and MRI scans in a parasagittal section may show a "pipe" sign where the left superior vena cava occurs. [4] Treatment [ edit ] If no other cardiac abnormalities are present, PLSVC will not be treated, as it is usually asymptomatic and unharmful. [4] If it drains into the left atrium , then deoxygenated blood enters the circulation to the body, and cyanosis may occur. [8] References [ edit ] ^ Pahwa R, Kumar A (May 2003). ... Med. J . 96 (5): 528–9. doi : 10.1097/01.smj.0000060885.27846.91 . PMID 12911199 . ^ Gonzalez-Juanatey C, Testa A, Vidan J, et al. ... New York: Macmillan Publishing. ^ a b c d e Crispi, Fatima; Martinez, Josep M. (2018-01-01), Copel, Joshua A.; D'Alton, Mary E.; Feltovich, Helen; Gratacós, Eduard (eds.), "92 - Anomalies of Systemic Venous Return" , Obstetric Imaging: Fetal Diagnosis and Care (Second Edition) , Elsevier, pp. 411–414.e1, doi : 10.1016/b978-0-323-44548-1.00092-9 , ISBN 978-0-323-44548-1 , retrieved 2020-11-16 ^ a b c Fligner, Corinne L.; Clark, John I.; Clark, Judy M.; Larson, Lyle W.; Poole, Jeanne E. (2018-01-01), Poole, Jeanne E.; Larson, Lyle W. (eds.), "2 - Surgical Anatomy for the Implanting Physician" , Surgical Implantation of Cardiac Rhythm Devices , Elsevier, pp. 13–58, doi : 10.1016/b978-0-323-40126-5.00002-1 , ISBN 978-0-323-40126-5 , retrieved 2020-11-16 ^ Berg C, Knüppel M, Geipel A, et al. ... PMID 7368902 . ^ a b Marelli, Ariane J. (2012-01-01), Goldman, Lee; Schafer, Andrew I.