The Value of the Right Precordial Leads of the Electrocardiogram

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Abstract
The electrocardiogram continues to be a valuable, noninvasive, easily repeatable, and inexpensive means of diagnosing many cardiac abnormalities, such as myocardial infarction, ischemia, and ventricular hypertrophy, and it is unequaled in the analysis of cardiac arrhythmias. Also, in the past few decades the clinical information that can be derived from the electrocardiogram has grown continually.1 Traditionally, 12 leads are recorded, 6 leads on the extremities and 6 on the precordium. This has been the standard approach for almost half a century. The extremity leads give a more distant image of the electrical activity of the heart. For example, leads II . . .