Expected headings
"Associations"
"Echocardiography"
"Clinical importance"
"A left-sided SVC forms when the left anterior cardinal vein is not obliterated during normal fetal development. The persistent left-sided SVC passes anterior to the left hilum and lateral to the aortic arch before rejoining the circulatory system. There are several possible drainage sites:"
"coronary sinus (92%) functionally insignificant since venous return from the head, neck and upper limbs is delivered to the right atrium 3"
"Direct visualisation of a left-sided SVC is not possible; however, its presence can be implied if a catheter or line is in an unexpected left paramediastinal location."
"Transthoracic echocardiography may be enhanced by the use of agitated saline if there is clinical suspicion of a left-sided SVC. Placement of a peripheral intravenous cannula in the left arm, agitation of saline, and subsequent injection should coincide with visualisation of the right ventricular outflow tract and coronary sinus in the parasternal long-axis view; the latter (coronary sinus) will fill before the former (right ventricular outflow tract) in the presence of a left-sided SVC 7."