Abstract
ABSTRACTAn instrument has been designed which will print maximum, minimum, and mean heart rate (HR) data for 10‐sec sample periods. The basic components are three detector circuits which sample and hold voltage levels proportional to the values measured, a digital voltmeter for “reading” these values, and a solenoid‐operated adding machine to print out HR data in beats per minute. This apparatus greatly reduces the time required for transcribing cardiotachometer tracings into digital form for statistical analysis.
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