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(Circulation. 1968;37:20.)
© 1968 American Heart Association, Inc.

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Recognition and Significance of Intraventricular Block due to Myocardial Infarction (Peri-infarction Block)

K. S. SHADAKSHARAPPA M.D.¹; J. M. KALBFLEISCH M.D.¹; L. L. CONRAD M.D.¹; N. K. SARKAR M.D.¹

¹ From the Department of Medicine, University of Oklahoma Medical Center, and the Medical Service, Veterans Administration Hospital, Oklahoma City, Oklahoma.

Evidence of peri-infarction block was found in 39% of the electrocardiograms of 1,938 patients with definite evidence of myocardial infarction. It most commonly occurred acutely or within several days following infarction and was more common with recurrent infarction. Peri-infarction block infrequently disappeared and was associated with higher values for serum glutamic-oxalacetic transaminase and a greater mortality in the first year following myocardial infarction. There was no autopsy correlation of peri-infarction block and ventricular aneurysmal formation.

The term "peri-infarction block" is appropriate only when abnormal intraventricular conduction occurs in association with definite electrocardiographic evidence of myocardial infarction.

Key Words: Serum glutamic-oxalacetic transaminase • Ventricular aneurysm • Electrocardiogram in myocardial infarction