SAMUEL BAER, M.D.
The estimation of the circulatory status of a patient is one of the most important problems the physician is called upon to face. Dyspnea, basal râles, tachycardia, hepatomegaly and peripheral edema usually indicate the presence of cardiac failure. But one may at times be sorely perplexed in determining whether the dyspnea complained of is cardiac, pulmonary or extrathoracic in origin; or whether the obvious pleural effusion is due to heart disease, thoracic tumor, malnutrition or hypertension.
Two of the factors influencing the maintenance of circulatory efficiency are the minute output of the heart, and the velocity of blood flow. The
BAER S. THE CLINICAL APPLICATION OF THE DETERMINATION OF CIRCULATION TIME1. Ann Intern Med. ;13:2246–2252. doi: 10.7326/0003-4819-13-12-2246
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Published: Ann Intern Med. 1940;13(12):2246-2252.
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