CARLETON B. CHAPMAN, M.D., F.A.C.P.
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In a previous communication (1) it was noted that some form of cardiac control system must exist in every member of the animal kingdom advanced enough to possess a heart or the analogue of one. These systems come to be more exquisite and impressive the more one studies them. The over-all design of the mammalian circulatory control system has been described in engineering terms by Sarnoff who speaks of "2 input sensitive pumps" under a remarkably efficient "command system." Nearly 30 years ago, Vannevar Bush did somewhat the same thing (2) when he noted that the combined output of American
CHAPMAN CB. The Autonomy of the Circulatory System. Ann Intern Med. ;60:1069–1072. doi: 10.7326/0003-4819-60-6-1069
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Published: Ann Intern Med. 1964;60(6):1069-1072.
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