CARLETON B. CHAPMAN, M.D., F.A.C.P.
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
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CHAPMAN CB. The Autonomy of the Circulatory System. Ann Intern Med. 1964;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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