Superimposition of Transmural Infarction Following Acute Subendocardial lnfarction *

Thirty-five consecutive patients with acute subendocardial infarction admitted to the coronary care unit during a 15-month period were identified and analyzed for location of infarction, and for the in-hospital course in terms of recurrent chest pain, the occurrence of a second infarction, and the clinical status at the end of hospitalization. Thirteen patients developed a transmural infarction sometime between 3 and 21 days (average, ten days) after the initial subendocardial infarction. The transmural infarction was defined by a separate episode of severe and