Fig. 2

Morphological changes of the heart in massive pulmonary embolism (PE). Note the dilated right heart and decompressed left heart. PE occludes the main trunk of the pulmonary artery, resulting in marked increase in afterload of the right ventricle. Abbreviations: SVC superior vena cava, IVC inferior vena cava, RA right atrium, RV right ventricle, LA left atrium, LV left ventricle, AO aorta, PA pulmonary artery