Systems and methods for concurrently measuring Impedance Cardiography (ICG) and Electrocardiography (ECG) data are provided. Various embodiments of the present technology provide systems and methods for overcoming limitations of conventional systems by uniquely utilizing a single set of electrodes and cables for both measurements. Embodiments include a system and method that uses a method of connecting a single set of cables and electrodes to a patient's body, injecting an alternating current into the patient's body for ICG measurements while generating no current for ECG measurements, acquiring physiological signals via the single set of cables and electrodes, time-division multiplexing these acquired signals to interleave ICG and ECG data acquisition, and directing the multiplexed signals to distinct first and second processing circuits for ICG and ECG respectively. This approach enables enhanced efficiency, real-time display of virtually synchronized waveforms, and improved verification capabilities for critical physiological events.

Systems and methods for concurrently measuring Impedance Cardiography (ICG) and Electrocardiography (ECG) data are provided. Various embodiments of the present technology provide systems and methods for overcoming limitations of conventional systems by uniquely utilizing a single set of electrodes and cables for both measurements. Embodiments include a system and method that uses a method of connecting a single set of cables and electrodes to a patient's body, injecting an alternating current into the patient's body for ICG measurements while generating no current for ECG measurements, acquiring physiological signals via the single set of cables and electrodes, time-division multiplexing these acquired signals to interleave ICG and ECG data acquisition, and directing the multiplexed signals to distinct first and second processing circuits for ICG and ECG respectively. This approach enables enhanced efficiency, real-time display of virtually synchronized waveforms, and improved verification capabilities for critical physiological events.

A device for functional electrical stimulation (FES), neuromuscular electrical stimulation (NMES), and/or in receiving electromyography (EMG) signals includes a sleeve and electrodes. The sleeve is sized and shaped to be worn on a human arm, and comprises a stretchable fabric The electrodes are secured with the sleeve and positioned to contact skin of the human arm when the sleeve is worn on the human arm. An electronic circuit is configured to operate the electrodes. The electronic circuit includes relays connecting the electrodes with a stimulator for performing FES or NMES, and EMG readout circuitry connecting the electrodes with an EMG amplifier. The relays are closed during FES or NMES to connect the stimulator with the electrodes. The relays are open during EMG readout to isolate the stimulator from the EMG amplifier.

A device for functional electrical stimulation (FES), neuromuscular electrical stimulation (NMES), and/or in receiving electromyography (EMG) signals includes a sleeve and electrodes. The sleeve is sized and shaped to be worn on a human arm, and comprises a stretchable fabric The electrodes are secured with the sleeve and positioned to contact skin of the human arm when the sleeve is worn on the human arm. An electronic circuit is configured to operate the electrodes. The electronic circuit includes relays connecting the electrodes with a stimulator for performing FES or NMES, and EMG readout circuitry connecting the electrodes with an EMG amplifier. The relays are closed during FES or NMES to connect the stimulator with the electrodes. The relays are open during EMG readout to isolate the stimulator from the EMG amplifier.

Real-time electrocardiogram (ECG) monitoring system for wearable devices. Embodiments of the invention are based on parallel Delta modulator architecture with local maximum point and local minimum point algorithms to detect QRS and PT waves. The parallel Delta modulators preferably convert ECG signals to two channels of three-state Delta modulated bitstreams. Using embodiments of the invention, real-time PR and RT intervals, as well as ST segment measurements, can be achieved in long-term wearable ECG recording devices.

Real-time electrocardiogram (ECG) monitoring system for wearable devices. Embodiments of the invention are based on parallel Delta modulator architecture with local maximum point and local minimum point algorithms to detect QRS and PT waves. The parallel Delta modulators preferably convert ECG signals to two channels of three-state Delta modulated bitstreams. Using embodiments of the invention, real-time PR and RT intervals, as well as ST segment measurements, can be achieved in long-term wearable ECG recording devices.

A method for non-invasively identifying a location of a subcutaneous tumor comprising: providing a patient with a possible subcutaneous tumor; providing a detector comprising one or more radio-frequency (RF) planar resonant loop sensors, each sensor comprising a planar resonant loop and an element disposed within and co-planar with a loop formed by the planar resonant loop; creating a first localization map of resonant frequencies of an area including the possible tumor using the detector; and creating a second localization map of |s.sub.11| reflection coefficients of the area including the possible tumor using the detector.

A method for non-invasively identifying a location of a subcutaneous tumor comprising: providing a patient with a possible subcutaneous tumor; providing a detector comprising one or more radio-frequency (RF) planar resonant loop sensors, each sensor comprising a planar resonant loop and an element disposed within and co-planar with a loop formed by the planar resonant loop; creating a first localization map of resonant frequencies of an area including the possible tumor using the detector; and creating a second localization map of |s.sub.11| reflection coefficients of the area including the possible tumor using the detector.

Switching systems are positioned along a bidirectional signal carrying line, typically between an electrode in a catheter at the heart of a patient, and an external console. The switching system provides for switching the bidirectional signal carrying line between: a main line, which carries acquired electrocardiac signals from the electrode of the catheter at the heart of the patent to the external console, via a switch unit; and, a bypass line, which carries pacing signals, directly from the external console to the electrode of the catheter. The bypass line provides an uninterrupted electrical connection between the electrode and the external console, thus avoiding the switch unit.

Switching systems are positioned along a bidirectional signal carrying line, typically between an electrode in a catheter at the heart of a patient, and an external console. The switching system provides for switching the bidirectional signal carrying line between: a main line, which carries acquired electrocardiac signals from the electrode of the catheter at the heart of the patent to the external console, via a switch unit; and, a bypass line, which carries pacing signals, directly from the external console to the electrode of the catheter. The bypass line provides an uninterrupted electrical connection between the electrode and the external console, thus avoiding the switch unit.