10 results about "Ecg waveforms" patented technology

Embodiments of the present disclosure utilize DNNs for ECG interpretation, where original ECG waveforms are directly ingested by the DNNs using paired interpretation labels for training, without the need for explicatory feature extraction or rule-based criteria.

This invention discloses a method for phase synchronization of multimodal data from heart sounds, electrocardiograms (ECG), and echocardiograms, belonging to the field of medical image processing technology. The method includes the following steps: A1. Acquiring original echocardiogram video images and independently recorded heart sound audio data; A2. Preprocessing the acquired data and automatically constructing samples; A3. Constructing a dual-path neural network architecture and extracting ECG waveforms to obtain a digitized ECG signal sequence; A4. Identifying periodic feature points of heart sounds and ECGs based on the digitized ECG signals; A5. Aligning asynchronous data based on linear phase resampling. This invention uses a linear interpolation algorithm to forcibly map video frames, electrical signals, and heart sound signals at different sampling rates to a unified phase coordinate system, ultimately achieving absolute synchronization of the three in terms of the physiological logic of cardiac pulsation, eliminating the influence of individual heart rate differences on data alignment.

A defibrillator using an ECG analyzer and a shock impedance advisor for improving defibrillation of a patient's heart by a defibrillation discharge circuit associated with the defibrillator. In operation, the ECG analyzer derives a shock delivery decision from detecting a shockable rhythm in the patient's ECG waveform in response to a shock delivery decision, and the shock impedance advisor measures the non-shock impedance of the defibrillation discharge circuit, estimates a pre-shock impedance of the defibrillation discharge circuit from the measured non-shock impedance of the defibrillation discharge circuit, and communicates a lower shock impedance advisory to a responder operating the defibrillator when the pre-shock impedance of the defibrillation discharge circuit exceeds a shock impedance threshold.

A system and method for guiding medical device placement. The system includes a console, a portable acquisition unit for receiving intracavitary and surface electrocardiogram (ECG) signals, and connection hardware, including a sterile ECG adapter and cable for fluid-filled catheters or a sterile clip cable for guidewires. Processors display real-time ECG waveforms and, in response to user input, capture static snapshots at different insertion depths. These snapshots are displayed chronologically on a graphical user interface, forming a visual trajectory of the device. The system determines the device's location by detecting ECG features from each snapshot and comparing them to predetermined boundaries. A location indication is displayed for each snapshot, providing objective guidance for placement and confirmation.

A catheter placement system includes a catheter assembly, an external ultrasound probe, a tip location sensor, and a console. The catheter assembly includes a catheter, a magnetic component producing a magnetic field, and an electrocardiogram (ECG) sensor designed to measure an intravascular ECG signal. The external ultrasound probe includes user input controls. The tip location sensor is configured to detect the magnetic field of the magnetic component when the catheter is disposed in the patient, the magnetic field providing magnetic field information for locating the magnetic component relative to the tip location sensor, and to receive the intravascular ECG signal from the ECG sensor. The console is coupled to the tip location sensor and includes a processor and a display. The display is configured to show an image from the external ultrasound probe, a graphical representation of the magnetic component, and successive ECG waveforms detected by the ECG sensor.

A patient monitoring device (20) employing an ECG monitor (24) and a controller (26). In operation, the ECG monitor (24) monitors a corrupted ECG waveform (30), and the controller (26) classifies the corrupted ECG waveform (30) as one of a non-shockable rhythm or a potentially shockable rhythm. The corrupted ECG waveform (30) is classified by the controller (26) as the non-shockable rhythm responsive to a detection by the controller (26) of a presence of an asystole rhythm within the corrupted ECG waveform (30). Conversely, the corrupted ECG waveform (30) is classified by the controller (26) as the potentially shockable rhythm responsive to a detection by the controller (26) of an absence of the asystole rhythm within the corrupted ECG waveform (30) or an indetermination by the controller (26) as to the presence of the asystole rhythm within the corrupted ECG waveform (30).

A defibrillator employs an ECG monitor and a defibrillation controller for supporting a viewer to make a resuscitation termination (TOR) decision during cardiopulmonary resuscitation (CPR) of a patient's heart by the viewer. In an operation during CPR of a patient's heart by a viewer, an ECG monitor monitors an ECG waveform of the patient's heart, and a defibrillation controller monitors the CPR and TOR parameters of the ECG waveform, derives a TOR suggestion from the monitoring of the TOR parameters, and communicates the TOR suggestion to the viewer based on at least one of a request by the viewer or an occurrence of a TOR event.

The invention provides a sensor for measuring both impedance and ECG waveforms that is configured to be worn around a patient's neck. The sensor features 1) an ECG system that includes an analog ECG circuit, in electrical contact with at least two ECG electrodes, that generates an analog ECG waveform; and 2) an impedance system that includes an analog impedance circuit, in electrical contact with at least two (and typically four) impedance electrodes, that generates an analog impedance waveform. Also included in the neck-worn system are a digital processing system featuring a microprocessor, and an analog-to-digital converter. During a measurement, the digital processing system receives and processes the analog ECG and impedance waveforms to measure physiological information from the patient. Finally, a cable that drapes around the patient's neck connects the ECG system, impedance system, and digital processing system.

The defibrillator uses an ECG monitor and a defibrillation controller to support a responder in determining termination of resuscitation (TOR) during cardiopulmonary resuscitation (CPR) administered by the responder to the patient's heart. In operation during administration of CPR by the responder to the patient's heart, the ECG monitor monitors ECG waveforms of the patient's heart, and the defibrillation controller monitors TOR parameters of the CPR and ECG waveforms, derives a TOR advisory from the monitoring of the TOR parameters, and communicates the TOR advisory to the responder based on at least one of a request by the responder or the occurrence of a TOR event.

The present application generally relates to systems and methods for synchronizing deployment of various devices into cardiac tissue with ECG waveforms. Systems and methods may include using pressurized gas to actuate deployment and anchoring of a device (e.g., an implant configured to reshape a heart ventricle) into heart tissue. Deployment of the device may occur during a portion of the cardiac cycle where cardiac muscle tissue may be at its thickest (e.g., at the end of systole).