Computer-implemented electrocardiograhic data processor with time stamp correlation

摘要

A computer-implemented electrocardiographic data processor with time stamp correlation is provided. A monitoring circuit includes a persistent memory and power supply that powers an encoder that determines a differential voltage between a current discrete digital voltage value and a prior voltage value. The differential voltage is stored into the persistent memory in a digitized data stream representative of analog cardiac action potential signals. Digitally-encoded voltage values and time stamps are retrieved from the persistent memory. A post-processing application executes. A set of output voltages and voltage differences that each correspond to lower and upper bounds of voltage is stored. Each retrieved voltage value is compared to the voltage bounds and the voltage differences within which each retrieved voltage value falls is identified. The output voltages corresponding to the voltage differences is selected. A display depicts the output voltages as reproduced analog cardiac action potential signals and correlates the time stamps.

主权项

1. A computer-implemented electrocardiographic data processor with feedback cancellation, comprising:
a download station, comprising:
a data interface configured to physically interface to an electrocardiographic monitoring circuit, the monitoring circuit comprises a persistent memory and an onboard power supply that powers an encoder configured to determine a differential voltage between a current discrete digital voltage value and a prior discrete digital voltage value, the differential voltage is stored into the persistent memory in a digitized data stream representative of analog cardiac action potential signals; anda data retrieval module configured to retrieve digitally-encoded voltage values and feedback markers recorded by the monitoring circuit from the persistent memory of the monitoring circuit via the data interface; anda post-processing application configured to execute on a computer that is interfaced with the download station, comprising:
an onboard digital data store comprising a set of enumerated output voltages and enumerated ranges of voltage differences that each correspond to lower and upper bounds of voltage;a bias settings module configured to determine, based on the retrieved feedback markers, bias control settings used during recording of the analog cardiac action potential signals;a comparator configured to compare each normalized voltage value to the lower and upper bounds of voltage and to identify the enumerated range within which each normalized voltage value falls;a decoder configured to select the output voltages corresponding to the identified enumerated ranges as a reproduction of the analog cardiac action potential signals; anda feedback cancellation module configured to determine a contribution from feedback introduced by application of the bias control settings and to subtract the feedback contribution from the reproduced analog cardiac action potential signals.