PMID: 38125Jul 1, 1979

Precordial mapping of ST-segment elevation and Q waves following anterior myocardial infarction. The effects of established beta-blocking drugs

European Journal of Cardiology
K M FoxJ P Shillingford

Abstract

The electrocardiographic (ECG) signs of ST-segment elevation and the development of Q was using 72-lead precordial surface mapping, and the release of creatine kinase (CK) activity has been studied in 47 patients with uncomplicated anterior myocardial infarction. These findings were compared with a further nine patients who had acute myocardial infarction but were receiving long-term beta-blocking drugs. It was found that ST-segment elevation and Q waves had rapidly changing and different natural histories and that beta-blocking drugs altered the natural history of ST-segment changes but had no effect on the pattern and time course for the loss of electrically active myocardium. There was a close relationship between the precordial area of ST-segment elevation at 2--3 h and the final development of Q waves in the patients with uncomplicated anterior myocardial infarction. No similar relationship could be found in those on beta-blocking drugs. The pattern of changes in plasma CK and its MB isoenzymes activity were similar for both groups. The relationship between early ST-segment elevation and the final area of Q waves may prove useful in clinical practice. This may not apply where beta-blocking drugs are commenced before the in...Continue Reading

Related Concepts

Macro-Creatine Kinase
Myocardial Infarction
Acute Disease
Electrocardiographic Recorders
Adrenergic beta-Antagonists
Alloenzymes

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