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This monograph is a valuable contribution, especially helpful to those who wish to understand the principles underlying the production and interpretation of the electrocardiogram. It may not interest the average practitioner as it is highly technical, dealing with many questions of physics, especially with electricity, as they concern the physiology of the heart. It is a most creditable piece of investigation and is admirably presented.
The Electrocardiogram.. JAMA. 1931;96(12):974. doi:10.1001/jama.1931.02720380062041