A method of processing of electrocardiogram includes the steps of providing an electrocardiogram comprising signals in at least two channels; selecting at least two frequency ranges of the signal in each of the said at least two channels; calculating an envelope for the signal in each frequency range in each channel; dividing the calculated envelope of the signal in each frequency range in each channel into QRS complex segment envelopes; and computing an average or median envelope as an average or mean of QRS complex segment envelopes for each frequency range in each channel.

An information processing apparatus comprising: at least one processor configured to: specify a contact unit in contact with a part of a body of a subject among a plurality of contact units; connect the specified contact unit to a measurement unit that measures biological information of the subject in contact with the contact unit; and acquire the biological information of the subject measured by the measurement unit connected to the contact unit.

An information processing apparatus comprising: at least one processor configured to: specify a contact unit in contact with a part of a body of a subject among a plurality of contact units; connect the specified contact unit to a measurement unit that measures biological information of the subject in contact with the contact unit; and acquire the biological information of the subject measured by the measurement unit connected to the contact unit.

In certain examples, methods and structures are directed to an apparatus having a plurality of stretchable leads, with each of the plurality of stretchable leads including an associated electrode which is to receive electrical signals generated in response to a subject-s heart and to pass the received electrical signals along a respective one of plurality of stretchable leads. The apparatus also includes a patch integrating the stretchable substrate with the plurality of stretchable leads and with the patch having an area for circuitry to reside for collecting the electrical signals passed along each of the plurality of stretchable leads, wherein each of the plurality of stretchable leads is to be on a subject side of the patch. In more particular examples, the circuitry is used to provide a multi-lead ECG based on the electrical signals.

In certain examples, methods and structures are directed to an apparatus having a plurality of stretchable leads, with each of the plurality of stretchable leads including an associated electrode which is to receive electrical signals generated in response to a subject-s heart and to pass the received electrical signals along a respective one of plurality of stretchable leads. The apparatus also includes a patch integrating the stretchable substrate with the plurality of stretchable leads and with the patch having an area for circuitry to reside for collecting the electrical signals passed along each of the plurality of stretchable leads, wherein each of the plurality of stretchable leads is to be on a subject side of the patch. In more particular examples, the circuitry is used to provide a multi-lead ECG based on the electrical signals.

A signal acquisition circuit is provided in the present disclosure. The signal acquisition circuit includes a signal acquisition electrode, wherein the at least one signal acquisition electrode is provided with a signal acquisition branch circuit, and the signal acquisition electrode is provided with a feedback network branch circuit. A first terminal of the signal acquisition branch circuit is electrically connected to the signal acquisition electrode, a second terminal of the signal acquisition branch circuit is electrically connected to a signal input terminal of a signal processing module. A first terminal of the feedback network branch circuit is electrically connected to the signal acquisition electrode, a second terminal of the feedback network branch circuit is electrically connected to a Driven-Right-Leg Circuit.

A signal acquisition circuit is provided in the present disclosure. The signal acquisition circuit includes a signal acquisition electrode, wherein the at least one signal acquisition electrode is provided with a signal acquisition branch circuit, and the signal acquisition electrode is provided with a feedback network branch circuit. A first terminal of the signal acquisition branch circuit is electrically connected to the signal acquisition electrode, a second terminal of the signal acquisition branch circuit is electrically connected to a signal input terminal of a signal processing module. A first terminal of the feedback network branch circuit is electrically connected to the signal acquisition electrode, a second terminal of the feedback network branch circuit is electrically connected to a Driven-Right-Leg Circuit.

Medical apparatus and methods for diagnostic and site determination of cardiac arrhythmias within a heart of a subject are provided. A computing device receives, records and processes electrocardiogram (ECG) signals in the form of bipolar and unipolar ECGs associated with respective cardiac tissue locations corresponding to catheter distal end sensors on locations. Unipolar ECGs that include signals from a plurality of successive heartbeats corresponding to locations within an area of study are analyzed to identify Fractionated Unipolar ECG Signal Complexes (FUESCs) of unipolar ECGs by defining complexes of the unipolar ECGs that correspond to respective bipolar activity windows. Identified arrhythmia sites for treatment include a predetermined number of unipolar ECGs that have a predetermined number of FUESCs. Atrial arrhythmia sites for treatment by ablation can be identified with respect to FUESCs of unipolar ECGs that include signals from at least ten successive heartbeats of an atrial tissue study area.

An electrode multiplexing physiological parameter monitoring ring, comprising a built-in power supply (2), a microprocessor module (1), an electrocardiogram monitoring analog front end (3), a skin conductance monitoring module (4), a first electrode (6), and a second electrode (7). The microprocessor module (1) is connected to the electrocardiogram monitoring analog front end (3) and the skin conductance monitoring module (4). The first electrode (6) and the second electrode (7) are connected to the electrocardiogram monitoring analog front end (3), and the electrocardiogram monitoring analog front end (3) processes electrocardiogram signals collected by the first electrode (6) and the second electrode (7). The first electrode (6) and the second electrode (7) are further connected to the skin conductance monitoring module (4), and the skin conductance monitoring module (4) processes skin impedance signals collected by the first electrode (6) and the second electrode (7). A coupling manner in which the first electrode (6) and the second electrode (7) are coupled to the electrocardiogram monitoring analog front end (3) is direct current coupling or alternating current coupling, and is opposite to a coupling manner in which the first electrode (6) and the second electrode (7) are coupled to the skin conductance monitoring module (4). By means of the electrode multiplexing physiological parameter monitoring ring, electrocardiogram monitoring, heart rate monitoring, and skin conductance monitoring are implemented through only two electrodes, so that the number of electrodes is reduced, and system design is simplified.

A computer-implemented method for generating an annotated photoplethysmography signal, includes: recording an electrocardiogram or ECG signal; recording a photoplethysmography or PPG signal, semi-synchronously with the recording of the ECG signal; annotating segments in the ECG signal either algorithm-based or expert-based; time-aligning the PPG signal and the ECG signal; detecting ECG beats in the ECG signal; detecting PPG beats in the PPG signal; pairing the ECG beats onto the PPG beats; deriving annotations for PPG signal segments based on the nature of the ECG segment annotations and on how the ECG beats can be paired with the PPG beats; and annotating the PPG signal segments using the annotations, thereby generating the annotated PPG signal.