<prompt> Which of the follow ing is not a chest radiographic feature of left atrial enlargement?Double left heart borderElevated left main bronchousSplaying of carinaEnlargement of left atrila appendage  <response>: Ans. is a i.e., Double left heart border Ref: Sutton 7thep. 280; 350Sings of left atrial enlargementStraightening of left heart border due to enlargement of left atrial appendage.Elevation of left main bronchus with widening Splaying of carina.Double density atrial sign.Posterior displacement of esophagus on barium swallow.Prominent posterosuperior part of cardiac shadow. 