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ARTICLE |

THE OUTPUT OF THE HEART PER BEAT IN HYPERTHYROIDISM

I. M. RABINOWITCH; ELEANOR V. BAZIN
Arch Intern Med (Chic). 1926;38(5):566-572. doi:10.1001/archinte.1926.00120290015002.
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In a previous article1 the measurement of the output of the heart per beat, by direct determination of the oxygen contents of arterial and venous blood, was shown to be a practical clinical procedure. Marked and consistent differences were noted between the values obtained in normal persons and in those with heart failure. The results in normal subjects agreed very closely with those obtained by other methods employed by physiologists and regarded as reliable. Briefly the test consists of the simultaneous determination of (a) the oxygen contents of arterial and venous bloods; (b) the oxygen requirement of the tissue per minute, and (c) the pulse rate. From these are calculated in order (a) the oxygen consumption, that is, the difference between the arterial and venous oxygen contents; (b) the total output of blood per minute from the heart, and (c) the output per beat. Thus,Image not available.in which

T=output per beat (cubic

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The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
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