DEVICE FOR PLOTTING OF CARDIAC RHYTHMOGRAM Russian patent published in 1997 - IPC

FIELD: medical equipment, can be used in applied medicine and medico-biological physiologic examinations for observation of the nature of regulation of cardiac rhythm of sick and healthy people, in sport and space medicine, of people working in extraordinary conditions, etc. SUBSTANCE: electrocardial signal is converter in the device into a form convenient for observation and recording, in particular, the device provides for application of methods of visual and computer analyses of the wave structure of the cardiac rhythm by the characteristic of RR - intervalogram or rhythmogram in priority examinations. Rhythmogram is formed by recording of a sawtooth signal on the tape of a recorder or printer, connected to which is a grounding connection performing the function of an amplifier and electrocardiosignal transducer. The device for plotting of cardiac rhythmogram uses series-connected amplifier, unit of active filters, level regulator, driver. The device has also a microprocessor, whose first interruption input is connected to the driver output, the second interruption input - to the function switch, the main input-output of the microprocessor is connected to a permanent storage, timer, whose outputs is connected to the third interruption input of the microprocessor, on-line storage, indicator signal generator and to the ports of input-output, whose mine outputs and one input serve as the device outputs for connection of the printer via the IRPR-M interface, and one output is connected to the divider and audio signal generator; one microprocessor output is connected to the input of the divider, whose first output is connected to the timer, the second output is connected to the audio signal generator, connected to whose output is a pulse audio indicator; the third output is connected to the input of the indicator signal generator, connected to whose output is the indicator; the other ten outputs of the divider connected by digits to the analog-to-digital converter, whose output serves as the output of the device for connection of the rhythmogram recorder; the second output of the microprocessor is connected to the level converter, whose output serves as the device output for connection of the computer via the RS-232 interface; besides, the amplifier output serves as the device output for connection of the electrocardiosignal recorder. EFFECT: improved design. 2 dwg