A Case of Acute Myocardial Infarction due to Left Main Trunk Occlusion Complicated With Aortic Dissection as Diagnosed by Intravascular Ultrasound.

A 52-year-old man was transferred to our hospital with a sudden onset of severe chest pains. His electrocardiogram revealed ST-segment elevation suggestive of acute myocardial infarction. Emergency coronary angiography showed subtotal occlusion of left main trunk (LMT) with delayed coronary flow.

Development of a tennis ball-sized tumor at the site of an implanted pacemaker.

A 77-year-old woman who had undergone a pacemaker implantation 6 years previously developed a tumor on the left side of the chest. The mass gradually grew to the size of a tennis ball and was excised along with the pacemaker generator. Histopathological examination revealed that the mass was a chronic expanding hematoma.