Digital beat-to-beat cardiotachometer.
A beat-to-beat cardiotachometer counting from 27 to 199 beats per minute has been constructed using digital integrated circuits. Power consumption is reduced, and accuracy enhanced, by incorporating a programmed read-only memory. This circuit technique can be employed for other devices, such as digital thermometers, in order to circumvent a nonlinear relationship between voltage and the physiological variable.
D003201:Computers; D006334:Heart Function Tests / Q000295:instrumentation*; D006339:Heart Rate; D006801:Humans