The significance of the subendocardial infarction.
Myocardial infarction without the development of Q waves on ECG should be labeled "non-Q-wave" rather than "subendocardial." The non-Q-wave infarction has doubtful significance in the patient with a prior myocardial infarction. However, as the first myocardial infarction, it is associated with lesser degrees of coronary artery disease and left ventricular dysfunction. It usually represents a smaller area of infarction, and it carries a favorable prognosis, especially in patients under 60.
D000818:Animals; D004285:Dogs; D004562:Electrocardiography; D004699:Endocardium / Q000473:pathology*; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D009203:Myocardial Infarction / Q000473:pathology / Q000503:physiopathology* / Q000628:therapy; D009206:Myocardium / Q000473:pathology