title: [Cardiorhythmograph].
abstract: A device containing a digital meter of cardiointervals (with a measuring accuracy of +/- 2 msec) and a digital-to-analog converter (for 10 bits) is proposed. The device ensures the high-quality registration of cardiointervalograms. The parallel binary codes carrying information on the duration of cardiointervals are supplied to the perforator control unit or directly to the computer. To ensure the rational use of the whole width of the recorder tape, the possibility of changing the amplification scale of the output analog signal and the compensation of its noninformative steady component are provided. The circuit of the device includes the counter of the number of analyzed cardiocycles with the output where the logical unit is changed for zero (and vice versa) after every 50 measured intervals. The device is activated either by the built-in integrated-circuit amplifier of biopotentials or by the demodulator of frequency-modulated signals transmitting ECG over the telephone.
mesh_terms: D000703:Analog-Digital Conversion; D003936:Diagnosis, Computer-Assisted / Q000295:instrumentation*; D004562:Electrocardiography / Q000295:instrumentation*; D004582:Electronics, Medical / Q000295:instrumentation; D006339:Heart Rate; D006801:Humans
vernacular_title: Kardioritmograf.