Which of the following statements about left ventricular aneurysm is/are correct?

B. Absent collateral circulation in an area of myocardium supplied by an acutely occluded artery favors aneurysm formation.

D. Aneurysm repair can improve associated cardiac valve dysfunction. 

E. Persistent ST segment elevation after acute myocardial infarction suggests aneurysm formation.

DISCUSSION: The mural thrombus frequently present on the endocardial surface of an aneurysm is usually adherent and rarely embolizes. Collateral circulation, when present, often prevents transmural necrosis following arterial occlusion. Since the left anterior descending coronary artery is the vessel most commonly occluded in patients with ventricular aneurysms, most of the aneurysms are anteroapical. Improvements in ventricular contour and reduction in ventricular volume accompany aneurysm repair. Although persistent elevation of ST segments following myocardial infarction is very suggestive of aneurysm formation, the diagnosis should be confirmed by more definitive tests.