"the right border is formed by the right atrium"
"the left border is formed by the left ventricle and left atrial appendage"
"the anterior border by the right ventricle"
"the posterior border by the left atrium (superiorly) and the left ventricle (inferiorly) and the inferior vena cava"
"The cardiac silhouette is considered enlarged if the cardiothoracic ratio is >50% on a PA view of the chest 1. See main article: enlargement of the cardiac silhouette for more information."
Expected headings
"Size"
"Shape"