A Case of Type-A WPW Syndrome Complicated by Acute Anterior Myocardial Infarction. Special Reference to Intermittent Masking of Infarction Pattern

A 63-year-old man with intermittent, type-A WPW syndrome, who suffered from acute anteroseptal myocardial infarction, is presented. The delta waves in V1-V4 masked the abnormal Q waves of anteroseptal MI, but reentrant tachycardia revealed the MI pattern. And also, when normal atrioventricular conduction was gained, the QS pattern due to MI was unmasked

Echocardiographic Features and Cardiac Motion in Electrical Alternans

A 54-year-old female with adenocarcinoma of the lung developed cardiac tamponade. An electrocardiogram revealed electrical alternans of QRS complex. An echocardiogram demonstrated a large pericardial effusion and pendulous motion of the left atrium as well as of the left ventricle. Echocardiographic features of cardiac tamponade and mechanism of electrical alternans were also discussed