Clinicopathological study of the heart and coronary arteries of autopsied cases from the community of Hisayama during a 10-year period. Part IV. QS waves in the precordial leads

Electrocardiographic evidence suggestive of myocardial infarction without significant organic heart disease

One hundred nineteen catheterized patients had ECG evidence of myocardial infarction in the absence of significant narrowing of coronary arteries or localized contractile abnormalities of the left ventricle. Eighty-seven had organic heart disease, but 32 had no demonstrable abnormality. ECG alterations in the latter group were almost equally divided between those in lead aVF and in the right precordial leads. Although certain depolarization defects are highly suggestive of myocardial infarction, similar changes may rarely be seen in normal people.