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Article
June 1930

THE CARDIAC OUTPUT IN HEART DISEASE: II. EFFECT OF EXERCISE ON THE CIRCULATION IN PATIENTS WITH CHRONIC RHEUMATIC VALVULAR DISEASE, SUBACUTE RHEUMATIC FEVER AND COMPLETE HEART BLOCK

Author Affiliations

BOSTON; ATLANTA, GA.

From the Medical Clinic of the Peter Bent Brigham Hospital.

Arch Intern Med (Chic). 1930;45(6):958-973. doi:10.1001/archinte.1930.00140120133007
Abstract

Our object in this study was to determine the effect of exercise on the cardiac output of several patients with heart disease. These patients were studied first under basal conditions, and the results were reported in paper I.1 The group consisted of three patients with chronic rheumatic valvular disease, one with subacute rheumatic fever, one with probable "chronic myocarditis" and two with complete heart block. In addition, control observations were made on four normal subjects, one of whom was obese.

The effect of graded exercise (by means of the stationary bicycle) on the output of the heart in normal subjects has been reported by Krogh and Lindhard,1a Means and Newburgh,2 Boothby,3 Collett and Liljestrand,4 and Bock and his co-workers.5 The earlier workers used the nitrous oxide method to determine the cardiac output, whereas Bock's observations were made with the modified "Haldane method." The latter procedure, as described by Bock, Dill

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