JAMA. 1907;XLVIII(1):47-50. doi:10.1001/jama.1907.25220270047002b.
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The digitalis arrhythmias have been so thoroughly described by Mackenzie1 that it would seem hardly possible to add to his description. Yet the subject is one of considerable interest, and, since the case here reported presented some peculiarities, I shall briefly relate the patient's history and the observations made on him.

Patient.  —J. E., laborer, aged 44, was admitted to the wards of Dr. J. O. Hirschfelder at the City and County Hospital, San Francisco, on April 17, complaining of pain in the left side, the back, and the legs. Family history was negative.

History.  —The man has had typhoid fever, pneumonia and malaria; he has used alcohol to excess and tobacco moderately. He has never had acute articular rheumatism, and denies venereal disease. For some time he has been short of breath on the least exertion and has had slight cough and expectoration. One year ago his chest was


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