Abstract: An Electrocardiography (ECG) system configured to produce an ECG output signal of a patient includes a plurality of electrodes, a monitoring circuit, a drive circuit, a lead circuit, and a control module. The electrodes form a plurality of leads. The monitoring circuit is configured to monitor a voltage differential on the leads and produce the ECG output signal. The drive circuit is configured to deliver a current to the electrodes based on a measured voltage at the electrodes. The lead fault detection system comprises one or more current sources configured to produce a current to deliver to the electrodes. The control module is configured to vary the current produced by the current sources based on a measured parameter at one or more of the electrodes.

Abstract: A system for monitoring electrical current leakage comprises a frequency injection circuit, one or more devices, and a microprocessor. The frequency injection circuit includes an electronic oscillator providing an electrical signal to a first side of an isolation barrier. The devices are located on a second side of the isolation barrier. The microprocessor samples the electrical signal and identifies deviations in the sampled electrical signal exceeding a predetermined threshold caused by the one or more devices. The microprocessor further generates one or more alert messages based on the identified deviations in the electrical signal.

Abstract: An Electrocardiography (ECG) system configured to produce an ECG output signal of a patient includes a plurality of electrodes, a monitoring circuit, a drive circuit, a lead circuit, and a control module. The electrodes form a plurality of leads. The monitoring circuit is configured to monitor a voltage differential on the leads and produce the ECG output signal. The drive circuit is configured to deliver a current to the electrodes based on a measured voltage at the electrodes. The lead fault detection system comprises one or more current sources configured to produce a current to deliver to the electrodes. The control module is configured to vary the current produced by the current sources based on a measured parameter at one or more of the electrodes.

Abstract: A system for monitoring electrical current leakage comprises a frequency injection circuit, one or more devices, and a microprocessor. The frequency injection circuit includes an electronic oscillator providing an electrical signal to a first side of an isolation barrier. The devices are located on a second side of the isolation barrier. The microprocessor samples the electrical signal and identifies deviations in the sampled electrical signal exceeding a predetermined threshold caused by the one or more devices. The microprocessor further generates one or more alert messages based on the identified deviations in the electrical signal.

Abstract: Embodiments provide a method and system for using a reconstructed or virtual reference point for electrocardiogram (ECG) measurements, allowing for the removal of the common reference point required in conventional ECG systems. Embodiments allow for either referencing measurements back to a reference previously digitized and reconstructed in the analog domain or to compare the measurements to a virtual reference. These calculations can be performed at the measurement site or remotely. Vector calculations can be made in either the analog or digital domains. A secondary means of measuring common mode noise (or rejection) injected into the ECG may be provided to ensure proper functioning in the presence of large common mode noise. These secondary measurements may be used to phase-align segments of the ECG vectors or as means to improve the common mode noise capabilities.