System for processing physiological data

An apparatus comprising:

• at least two ECG sensing electrodes configured and arranged to adhere to remote locations on a patient and to sense ECG signals from the patient;
• a digitizing circuit configured and arranged to digitize the ECG signals to provide digitized ECG signals;
• a computing circuit configured and arranged to process each digitized ECG signal by
• decomposing the signal into subcomponents;
• identifying a location of the QRS complex of a cardiac cycle in the ECG signal;
• identifying a first time window in the cardiac cycle that includes the QRS complex;
• identifying at least one time window in the cardiac cycle that does not include the QRS complex;
• for each of the identified time windows, identifying target subcomponents as subcomponents that contain more energy that is within the band of frequencies characteristic of a desired ECG signal in the time window than energy that is outside the band of frequencies of the desired ECG signal;
• and
• reconstructing a denoised physiological signal using at least two of the identified target subcomponents;
• a housing that houses the digitizing circuit and the computing circuit;
• a fastener configured and arranged to mechanically fasten the housing to a first one of the ECG sensing electrodes and to electrically couple the first one of the ECG sensing electrodes to the digitizing circuit;
• and
• for each additional one of the at least two ECG sensing electrodes that is in addition to the first one of the ECG sensing electrodes, a flexible insulated lead wire configured and arranged to couple the additional ECG sensing electrode to the digitizing circuit.

A patient-worn apparatus for recording an ECG from the patient, the apparatus comprising:

• a first circuit configured and arranged to digitize an ECG signal obtained from the patient via at least two ECG leads;
• and
• a computing circuit connected to the first circuit to receive the digitized ECG signal, the computing circuit being configured and arranged to
• decompose the digitized ECG signal into subcomponents,
• compute a statistical variance of the subcomponents over a time interval, and
• determine if one of the at least two ECG leads is disconnected from the patient based upon the statistical variance of the subcomponents.

An apparatus comprising:

• a first sensing electrode configured and arranged to adhere to a patient and to sense physiological signals from the patient;
• a denoising component coupled to the first sensing electrode and configured and arranged to receive the sensed physiological signals via the coupling to the first sensing electrode and coupling to a second sensing electrode, the denoising component including
• a digitizing circuit configured and arranged to digitize the signals,
• a computing circuit configured and arranged to process the digitized signals to remove noise therefrom while maintaining morphology of the physiological signals by reducing in-band noise as measured by the ANSI/AAMI EC57:1998 standard by at least 20 dB with a Quality of Signal Reconstruction of >95%,
• a battery configured and arranged to power the digitizing and computing circuits, and
• a housing configured and arranged to house the battery, digitizing circuit and computing circuit;
• and
• a fastener configured and arranged to mechanically fasten the housing to the first sensing electrode, the first sensing electrode being configured and arranged to support the weight of the denoising component via the fastener while the first sensing electrode is adhered to the patient.

An apparatus comprising:

• at least two ECG sensing electrodes configured and arranged to adhere to remote locations on a patient and to sense ECG signals from the patient;
• a digitizing circuit configured and arranged to digitize the ECG signals to provide digitized ECG signals;
• a computing circuit configured and arranged to:
• decompose the digitized ECG signal into subcomponents,
• compute a statistical variance of the subcomponents over a time interval, and
• determine if one of the at ECG sensing electrodes is disconnected from the patient based upon the statistical variance of the subcomponents;
• a housing that houses the digitizing circuit and the computing circuit;
• a fastener configured and arranged to mechanically fasten the housing to a first one of the ECG sensing electrodes and to electrically couple the first one of the ECG sensing electrodes to the digitizing circuit;
• and
• for each additional one of the at least two ECG sensing electrodes that is in addition to the first one of the ECG sensing electrodes, a flexible insulated lead wire configured and arranged to couple the additional ECG sensing electrode to the digitizing circuit.