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Measurement of Human Heart Rate during Usual Activity

Donald A. Rowley, Seymour Glagov and Peter Stoner
Science
New Series, Vol. 130, No. 3381 (Oct. 16, 1959), pp. 976-977
Stable URL: http://www.jstor.org/stable/1756688
Page Count: 2
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Abstract

A small, rugged, self-contained cumulative heart-beat counter has a transistorized amplifier, a watch movement made into a counter, and a battery. The counter is activated by each R-wave of the electrocardiographic complex obtained from newly designed precordial electrodes. Heart beats can be counted for as long as 24 hours.

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