All form right heart border EXCEPT?

BORDERS OF HEART • Right border (slightly convex): formed by the right atrium, SVC, and the IVC. • Left border (nearly horizontal): formed by the left ventricle and slightly by the left auricle. • Inferior border (oblique, nearly vertical), formed mainly by the right ventricle and slightly by the left ventricle. • Superior border: formed by the right and left atria and auricles in an anterior view