Method and apparatus for holter recorder with high resolution signal averaging capability for late potential analysis

Abstract

A method and apparatus for an ambulatory electrocardiographic monitoring system for recording, detection, measurement, analysis and plotting of high resolution electrocardiographic data having a modified Holter recorder that performs digital signal averaging of selected signals as well as storing for future playback all ECG beats. The digitally signal averaged beats are correlated with a previously defined correlation coefficient yielding summated results that have eliminated nonrepetitive noise to less than a microvolt. By real time averaging approximately 1000 beats during a 10 to 15 minute period and digitally storing the averaged data, micropotential averaging can be performed several times per hour for up to 24-hours. Analog recordings are precalibrated for accurate amplitude representation as well as providing an option for standard one millivolt calibration pulses at the beginning of the tape. Digital recordings are precalibrated relative to the acceptable levels without the use of a calibration signal. The recordings are downloaded to analysis systems at high speeds. If the recordings are analog they are digitized at a sufficiently high enough resolution to permit analysis of micropotentials. All recorded data is transferred to computer memory and hard disk for further review by the analysis system.

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