BLOOD VOLUME STUDIES IN SHOCK RESULTING FROM MYOCARDIAL INFARCTION. I. STUDIES WITH EVANS BLUE DYE (T-1824) 1

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Abstract
The blood volume changes in 32 patients with proved acute myocardial infarction are reported. The avg. blood volume of the 10 cases not in shock was 84 cc./kg.; 72 cc./kg. in the 10 patients in moderate shock; and 73 cc./kg. in the 12 cases that were severely shocked. Blood volume detns. done on surviving patients after convalescence revealed that patients with shock had had a 16% reduction in blood volume. The use of peripheral venous pressure to distinguish shock from congestive failure could not always be used in studying patients of this type. Venous pressures were not infrequently found to be elevated in severely shocked patients showing extreme vasoconstriction, but without evidence of heart failure.[long dash].