THE COLLAPSE PRODUCED BY VENOUS CONGESTION OF THE EXTREMITIES OR BY VENESECTION FOLLOWING CERTAIN HYPOTENSIVE AGENTS

^{Cardiovascular Research Laboratory, Georgetown University Hospital, Washington, D. C.}

^{Department of Medicine, Georgetown University School of Medicine, Washington, D. C.}

^{Veterans Administration Hospital, Washington, D. C.}

^{Evans Memorial, Massachusetts Memorial Hospitals, Boston, Mass.}

^{Department of Medicine, Boston University School of Medicine, Boston, Mass.}

Captain, M.C., U.S.A.F.

Supported in part by research grants from the National Heart Institute, U. S. Public Health Service, E. R. Squibb and Sons, New York, N. Y., and Irwin, Neisler and Company, Decatur, Ill.

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^{Cardiovascular Research Laboratory, Georgetown University Hospital, Washington, D. C.}

^{Department of Medicine, Georgetown University School of Medicine, Washington, D. C.}

^{Veterans Administration Hospital, Washington, D. C.}

^{Evans Memorial, Massachusetts Memorial Hospitals, Boston, Mass.}

^{Department of Medicine, Boston University School of Medicine, Boston, Mass.}

Captain, M.C., U.S.A.F.

Supported in part by research grants from the National Heart Institute, U. S. Public Health Service, E. R. Squibb and Sons, New York, N. Y., and Irwin, Neisler and Company, Decatur, Ill.

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^{Cardiovascular Research Laboratory, Georgetown University Hospital, Washington, D. C.}

^{Department of Medicine, Georgetown University School of Medicine, Washington, D. C.}

^{Veterans Administration Hospital, Washington, D. C.}

^{Evans Memorial, Massachusetts Memorial Hospitals, Boston, Mass.}

^{Department of Medicine, Boston University School of Medicine, Boston, Mass.}

Captain, M.C., U.S.A.F.

Supported in part by research grants from the National Heart Institute, U. S. Public Health Service, E. R. Squibb and Sons, New York, N. Y., and Irwin, Neisler and Company, Decatur, Ill.

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^{Cardiovascular Research Laboratory, Georgetown University Hospital, Washington, D. C.}

^{Department of Medicine, Georgetown University School of Medicine, Washington, D. C.}

^{Veterans Administration Hospital, Washington, D. C.}

^{Evans Memorial, Massachusetts Memorial Hospitals, Boston, Mass.}

^{Department of Medicine, Boston University School of Medicine, Boston, Mass.}

Captain, M.C., U.S.A.F.

Supported in part by research grants from the National Heart Institute, U. S. Public Health Service, E. R. Squibb and Sons, New York, N. Y., and Irwin, Neisler and Company, Decatur, Ill.

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^{Cardiovascular Research Laboratory, Georgetown University Hospital, Washington, D. C.}

^{Department of Medicine, Georgetown University School of Medicine, Washington, D. C.}

^{Veterans Administration Hospital, Washington, D. C.}

^{Evans Memorial, Massachusetts Memorial Hospitals, Boston, Mass.}

^{Department of Medicine, Boston University School of Medicine, Boston, Mass.}

Captain, M.C., U.S.A.F.

Supported in part by research grants from the National Heart Institute, U. S. Public Health Service, E. R. Squibb and Sons, New York, N. Y., and Irwin, Neisler and Company, Decatur, Ill.

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^{Cardiovascular Research Laboratory, Georgetown University Hospital, Washington, D. C.}

^{Department of Medicine, Georgetown University School of Medicine, Washington, D. C.}

^{Veterans Administration Hospital, Washington, D. C.}

^{Evans Memorial, Massachusetts Memorial Hospitals, Boston, Mass.}

^{Department of Medicine, Boston University School of Medicine, Boston, Mass.}

Captain, M.C., U.S.A.F.

Supported in part by research grants from the National Heart Institute, U. S. Public Health Service, E. R. Squibb and Sons, New York, N. Y., and Irwin, Neisler and Company, Decatur, Ill.

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^{Cardiovascular Research Laboratory, Georgetown University Hospital, Washington, D. C.}

^{Department of Medicine, Georgetown University School of Medicine, Washington, D. C.}

^{Veterans Administration Hospital, Washington, D. C.}

^{Evans Memorial, Massachusetts Memorial Hospitals, Boston, Mass.}

^{Department of Medicine, Boston University School of Medicine, Boston, Mass.}

Captain, M.C., U.S.A.F.

Supported in part by research grants from the National Heart Institute, U. S. Public Health Service, E. R. Squibb and Sons, New York, N. Y., and Irwin, Neisler and Company, Decatur, Ill.

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