An electrocardiographic signal measuring apparatus includes capacitive coupling type detection electrodes that detect an electrocardiographic signal of a subject without coming into contact with a skin of a body; a first amplifier that amplifies a detection signal detected by the detection electrodes; a feedback circuit that returns an inverted signal obtained by inverting an in-phase signal from the detection electrodes to the body of the subject via a feedback electrode; and guard electrodes placed via an insulator on a side, of the detection electrodes, opposite to a side facing the body of the subject. The detection electrode is connected to one of differential inputs of the second amplifier, the guard electrode is connected to the other of the differential inputs of the second amplifier, and outputs of the second amplifiers are connected respectively to differential inputs of the first amplifier.

A heart treatment system is disclosed capable of diagnosing one or more critical regions of interest for a biological rhythm disorder by sensing signals from biological tissue. If a critical region is not present at the current location of sensed signals, the system is capable of indicating a guidance direction in which to navigate to reach one or more critical regions. Ablation energy is delivered to treat said region of interest. Signals are again sensed and analyzed to assess the impact of treatment. This process is repeated until all critical regions of interest are treated. In some embodiments, all functionality is provided by a single sensing and treating catheter with display device and analytical software.

A heart treatment system is disclosed capable of diagnosing one or more critical regions of interest for a biological rhythm disorder by sensing signals from biological tissue. If a critical region is not present at the current location of sensed signals, the system is capable of indicating a guidance direction in which to navigate to reach one or more critical regions. Ablation energy is delivered to treat said region of interest. Signals are again sensed and analyzed to assess the impact of treatment. This process is repeated until all critical regions of interest are treated. In some embodiments, all functionality is provided by a single sensing and treating catheter with display device and analytical software.

An apparatus comprising: a displacement current sensor configured to measure for a subject one or more sensed electrical signals; and circuitry configured to process the one or more sensed electrical signals to obtain an electrocardiogram signal and a variable impedance signal caused by an arterial pulse wave.

A system-on-chip contactless physiological sensor (10) is provided which comprises a capacitive-sensor electrode (14) having a first capacitance (C1) and an amplifier device (18) connected to the capacitive-sensor electrode (14), the capacitive-sensor electrode (14) and amplifier device (18) at least in part forming an amplifier circuit for the physiological sensor (10). An artefact-reducing capacitor (20) is then connected in series between the capacitive-sensor electrode (14) and an input of the amplifier device (18), the artefact-reducing capacitor (20) having a second capacitance (C2) which is less than the first capacitance (C1). In this sensor (10), there is no impedance boosting input between the capacitive-sensor electrode (14) and the input of the amplifier device (18).

A system-on-chip contactless physiological sensor (10) is provided which comprises a capacitive-sensor electrode (14) having a first capacitance (C1) and an amplifier device (18) connected to the capacitive-sensor electrode (14), the capacitive-sensor electrode (14) and amplifier device (18) at least in part forming an amplifier circuit for the physiological sensor (10). An artefact-reducing capacitor (20) is then connected in series between the capacitive-sensor electrode (14) and an input of the amplifier device (18), the artefact-reducing capacitor (20) having a second capacitance (C2) which is less than the first capacitance (C1). In this sensor (10), there is no impedance boosting input between the capacitive-sensor electrode (14) and the input of the amplifier device (18).

A wrist-wearable device is described herein. The wrist wearable device includes a first skin-contact portion. The first skin contact portion (i) is coupled with a first set of biopotential-signal sensors for detecting first biopotential signals that are provided to a first flexible printed circuit board, and (ii) is coupled with an elastic material that extends beyond an end of the first skin-contact portion. The wrist wearable device includes a second skin-contact portion that is separated from the first skin-contact portion by a capsule structure. The second skin-contact portion is (ii) coupled with a second set of biopotential-signal sensors for detecting biopotential signals that are provided to a second flexible printed circuit board, and (ii) is coupled with a receiving loop for receiving the elastic material to affix the band to a body part of a wearer of the wrist-wearable device.

A sensing system comprising a hand-held sensing device with a vibracoustic sensor module (VSM). The VSM comprises a voice coil component comprising a coil holder supporting wire windings; a magnet component comprising a magnet supported by a frame, a magnet gap configured to receive at least a portion of the voice coil component in a spaced and moveable manner; a connector connecting the voice coil component to the magnet component, the connector being compliant and permitting relative movement of the voice coil component and the magnet component; a diaphragm configured to induce a movement of the voice coil component in the magnet gap responsive to incident acoustic waves; a housing for retaining the vibroacoustic sensor module having a handle end and a sensor end, the sensor end having an opening, the VSM positioned such that at least a portion of the diaphragm extends across the opening.

A sensing system comprising a hand-held sensing device with a vibracoustic sensor module (VSM). The VSM comprises a voice coil component comprising a coil holder supporting wire windings; a magnet component comprising a magnet supported by a frame, a magnet gap configured to receive at least a portion of the voice coil component in a spaced and moveable manner; a connector connecting the voice coil component to the magnet component, the connector being compliant and permitting relative movement of the voice coil component and the magnet component; a diaphragm configured to induce a movement of the voice coil component in the magnet gap responsive to incident acoustic waves; a housing for retaining the vibroacoustic sensor module having a handle end and a sensor end, the sensor end having an opening, the VSM positioned such that at least a portion of the diaphragm extends across the opening.

Disclosed is a system for monitoring a heart condition in a companion animal. The system can collect electrocardiogram data of a companion animal through a capacitive electrocardiogram sensor without prior preparation such as hair removal, collect phonocardiogram data and ballistocardiogram data through a phonocardiogram sensor and a ballistocardiogram sensor, and generate cardiogram-integrated data available for diagnosing a heart condition in the companion animal by merging the electrocardiogram data, the phonocardiogram data, and the ballistocardiogram data.