Right oblique transthoracic electrocardiogram.

In clinical electrocardiography many attempts have been made to achieve a higher degree of accuracy in the interpretation. One controversial subject is whether unipolar chest leads are more useful than Latterly he tested a transthoracic lead with the indifferent electrode placed in the 4th intercostal space at the right sternal border (station 1) and the exploring electrode placed in the left posterior axillary line (station 7). According to Evans this "right oblique lead" gives more information than conventional leads in patients with lateral or postero-lateral infarction. We, therefore, began using this lead together with routine leads at rest and in connexion with exercise tests, and hoped to achieve an improvement in the reliability of diagnosing coronary insufficiency. We also recorded the right oblique lead in normal subjects .