A Study of Unipolar Left Back Leads and Their Application to Posterior Myocardial Infarction

Abstract

The electrocardiographic diagnosis of myocardial infarction of the posterior wall is often missed because it is largely dependent on lead and because this electrode position often does not subtend the diseased myocardium. To remedy this defect, a new method is described—unipolar left back leads. The validity of this method in registering potential from the posterior left ventricular wall is discussed as well as its importance in the diagnosis of myocardial infarction of the posterior wall. Left back leads can illuminate the significance of questionable Q waves.