The emergency of the war, with its countless experiences of surgical shock, has directed attention to the problems of low blood pressure more emphatically than has ever been done before. Recent timely experimental contributions to this subject in The Journal by Pike and Coombs,2 Henderson and Haggard,3 and Guthrie4 bear witness to the importance and the intricacy of this much debated topic. It would be both futile and presumptuous to attempt in a brief editorial comment to unravel the difficulties presented. It may be worth while, however, to note for the reader less well versed in the phenomena encountered in connection with shock, that low arterial pressure, per se, may be due to at least two quite different causes, apart from failure of the heart itself. An actual deficiency of blood in the circulation, such as occurs after marked hemorrhage, reduces the output of the heart so
LOW ARTERIAL BLOOD PRESSURE. JAMA. 1917;LXIX(23):1974–1975. doi:10.1001/jama.1917.02590500056020
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