Comparison of some criteria for diagnosing a myocardial infarction after aorto-coronary bypass grafting (CABG).
The incidence of myocardial infarction during a 1-year follow-up period after coronary bypass surgery (CABG), i.e. a recent myocardial infarction (RMI), was studied in 86 patients. Different criteria for the diagnosis of a RMI were compared. Clinical observation, including ECG and serum enzyme analysis, diagnosed RMI in 8% of patients. Specific ECG changes indicating RMI (ECGsp) occurred in 12% of cases, and if less specific ECG changes were also taken into account (ECGsp+nonsp) RMI was found in 30% of cases. Asynergy, detected by two-plane ventriculography, indicated RMI in 24% of the patients, and was probably the most valid of the criteria examined. The differences in diagnostic accuracy of the various criteria highlight the importance of defining diagnostic criteria.
Backman
C
C
Department of Clinical Physiology, University Hospital of Northern Sweden, Umeå.
Jacobsson
K A
KA
Linderholm
H
H
Osterman
G
G
D000328:Adult; D000368:Aged; D000787:Angina Pectoris / Q000601:surgery; D001026:Coronary Artery Bypass; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000453:epidemiology; D011183:Postoperative Complications / Q000175:diagnosis* / Q000453:epidemiology; D011446:Prospective Studies; D015646:Ventriculography, First-Pass