Figure 21.4 Cardiac rupture post-myocardial infarction. (a) Acute ventricular septal rupture (arrowed) in a patient post-cardiac arrest. (b) Ventricular free wall rupture in a patient post-acute myocardial infarction. The left ventricular wall (distal septum) is thinned and dyskinetic (arrowed). There is a small amount of fluid in the pericardial space. An incidental finding was a left atrial myxoma (asterisk) seen prolapsing across the mitral valve. LA, left atrium; LV, left ventricle; RA, right atrium; RV, right ventricle; VSR, ventricular septal rupture.