Myocardial infarction -Heart attack with chest pain

The electrocardiogram in acute infarction would be most reliable. This is the main aid and it reflects the specific changes in a very short time. Those gross changes of infarction may appear in the electrocardiogram in the first hour in the majority of cases. In some case it may take as much as 24 hours or even more. The electrocardiogram also shows changes suggestive of angina & cardiac ischemia
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