Abstract

A system for detecting, quantizing, and displaying simultaneously on a single recording a wide panorama of cardiac diagnostic information including data inputs from EKG, phono-doppler, sound, and pulse; displaying each input in a distinctive color or form, in coordinates of time, frequency, and amplitude. A multi-channel recording system with an "instant replay" feature is employed to record simultaneously the respective inputs plus a timing pulse in separate channels, the timing pulse being generated by the periodic recurrence of a characteristic signal present in one of said inputs. A given sequence is selected for analysis and the recorded inputs for that sequence are replayed and fed to a high speed digital voltmeter-computer combination which dissects the wave form of the signals of each of said inputs separately and provides a read-out of the entire time, frequency, and amplitude content of all portions of the wave form of each input. A plotter transcribes the output of the computer three dimensionally, that is, in coordinates of time, frequency, and amplitude and distinguishes between the respective forms of data by presenting each in a distinctive color. A record of the output of the computer is also provided by means of a conventional computer print-out.

Other References

• Blumenfield et al., "Medical & Biological Engineering", vol. 9, No. 6, Nov. 1971, pp. 637-643