System for non-invasive cardiac diagnosis
First Claim
1. A system for collecting and displaying data for cardiac diagnosis, comprising means for transducing into electrical signals energy waves detectable at the suface of the body emanating from the cardiovascular system;
- broad band means for recording the output of said transducer corresponding to at least a segment of a given heart beat;
a voltmeter for measuring and indicating the instantaneous voltage of electrical signals;
means for repetitively feeding given portions of said recorded segment to said voltmeter;
means for controlling said voltmeter to measure and indicate the instantaneous voltage of a succession of said portions sequentially and separately in extremely short intervals and for storing said indications to provide a composite stored replica of the given short portions of the wave form of said segment of said signals corresponding to a given short period of time which short period encompasses a multiplicity of said extremely short intervals;
means for deriving from said stored replica the entire frequency content of said wave form for said short portion and for recording same graphically in coordinates of time, frequency and amplitude; and
means for controlling the voltmeter controlling means to index successively to measure, store, derive and record the frequency contents of successive short portions of said wave form following said given short portion, whereby a three dimensional recordation of the time-frequency-amplitude content of said wave form is produced.
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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.
194 Citations
5 Claims
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1. A system for collecting and displaying data for cardiac diagnosis, comprising means for transducing into electrical signals energy waves detectable at the suface of the body emanating from the cardiovascular system;
- broad band means for recording the output of said transducer corresponding to at least a segment of a given heart beat;
a voltmeter for measuring and indicating the instantaneous voltage of electrical signals;
means for repetitively feeding given portions of said recorded segment to said voltmeter;
means for controlling said voltmeter to measure and indicate the instantaneous voltage of a succession of said portions sequentially and separately in extremely short intervals and for storing said indications to provide a composite stored replica of the given short portions of the wave form of said segment of said signals corresponding to a given short period of time which short period encompasses a multiplicity of said extremely short intervals;
means for deriving from said stored replica the entire frequency content of said wave form for said short portion and for recording same graphically in coordinates of time, frequency and amplitude; and
means for controlling the voltmeter controlling means to index successively to measure, store, derive and record the frequency contents of successive short portions of said wave form following said given short portion, whereby a three dimensional recordation of the time-frequency-amplitude content of said wave form is produced. - View Dependent Claims (2, 3, 4, 5)
- broad band means for recording the output of said transducer corresponding to at least a segment of a given heart beat;
Specification