QRS-T Patterns in Multiple Precordial Leads that May Be Mistaken for Myocardial Infarction

Abstract

The electrocardiograms of patients with pathologic evidence of right ventricular hypertrophy and/or dilatation and exclusion of myocardial infarction are presented to bring out certain features likely to be mistaken for myocardial infarction: (1) abnormal qR or QS patterns or cove plane inversion of the T waves in leads from the right precordium; (2) reduction in the amplitude of the initial R wave or replacement by a QS deflection and/or change from an upright to an inverted T wave as the electrode is moved from the V 1 position to the transitional zone; (3) abnormal qrS deflections in leads from the left axilla.