10 results about "Fibrillation" patented technology

Devices, systems and methods are provided for treating target tissue with pulsed electric field energy in a manner that does not induce cardiac arrhythmias such as fibrillation of the heart and therefore negates any need for cardiac synchronization of energy delivery. Cardiac synchronization is typically employed to avoid delivering energy during portions of the cardiac cycle that are vulnerable to inducing fibrillation. Thus, herein parameters are manipulated to reduce the probability of inducing an arrhythmia. Typically, high voltage energy can trigger a premature action potential within the cardiac muscle as the delivered energy increases the cardiac muscle cell membrane permeability allowing ion transport, which can induce cardiac arrhythmias, especially ventricular fibrillation. However, both shorter pulse durations (i.e. higher frequencies such as 100-600 kHz) and biphasic waveform shapes theoretically and practically reduce the probability of inducing an arrhythmia.

This item is the main unit of an automated external defibrillator (AED), which performs defibrillation by delivering an electric shock to the heart to eliminate fibrillation, for example, when a patient's heart goes into fibrillation. By attaching electrodes (pads) connected to this item to the patient's chest, the patient's electrocardiogram is automatically analyzed, and defibrillation is performed as needed. The central panel may have a display unit as shown in Reference Figure 1, which shows the state of use, or it may not have a display unit as shown in Reference Figure 2, which also shows the state of use.

The present disclosure applies to methods of cardiac ablation that use an algorithm to determine where in the heart a driver of atrial fibrillation is located. Catheters with multi-electrode arrays are used to measure electrograms from cardiac signals wherein abnormal signals are identified as electrogram deflections with characteristic shapes. The electrogram deflections are compared to each other in pairs to determine which came first in time in order to determine the net direction of propagation of a fibrillatory wave. The signal that came first is assigned a positive point value so that once the plurality of electrograms have been compared, the signal with the highest point value can be identified as a driver of fibrillation. The data can be displayed graphically as a map of atrial fibrillation drivers on a 3D representation of a heart, allowing surgeons to quickly and easily identify where on the heart the driver is.

The present invention is a multi-stage treatment that heals tissue or organ damage (e.g., linear defects, fissures, and fibrillations, as well as focal and large defects) in collagen-rich tissues and organs such as articular cartilage. The present invention includes methods 1) to prime tissues in preparation for treatment, which comprises “melting” the tissue matrix, 2) to add or fill the damaged area with a “melding” agent, comprising of endogenous or exogenous tissue matrix, with or without cells, with or without exogenous biomaterials, and with or without endogenous or exogenous enzymes, such that the melding agent enhances anchoring into the defect for the purpose of integration and / or tissue healing. The Melt-and-Meld process can also be applied in conjunction with any existing treatments of tissue or organ defects.

This item is the main unit of an automated external defibrillator (AED), which performs defibrillation by delivering an electric shock to the heart to eliminate fibrillation, for example, when a patient's heart goes into fibrillation. By attaching electrodes (pads) connected to this item to the patient's chest, the patient's electrocardiogram is automatically analyzed, and defibrillation is performed as needed. The central panel may have a display unit as shown in Reference Figure 1, which shows the state of use, or it may not have a display unit as shown in Reference Figure 2, which also shows the state of use.

The invention provides an asymmetrically flexible cardiac mapping catheter that includes a deformation mechanism by which a user may deform a distal portion of the catheter giving the user the ability to reach, and map electrical activity of, substantially any surface within the heart.

This invention discloses an integrated left atrial appendage occluder, comprising a sealing part and an anchoring part connected as one unit. The sealing part has one end fixedly connected to an occlusion head, and the other end integrated with the anchoring part, having a sealing tensioning part protruding from the anchoring part. The anchoring part has an anchoring convergence part at its end, and has several anchoring support beams symmetrically arranged around the central axis of the occlusion head. The anchoring support beams are provided with anchoring hooks along the direction of the delivery pipe. The left atrial appendage occluder of this invention has high reliability, safety, and sealing stability, can be repeatedly recycled, and exhibits strong flexibility in the vertical direction and circumferential sealing flexibility, better meeting the clinical needs for left atrial fibrillation (AF).

This item is the main unit of an automated external defibrillator (AED), which performs defibrillation by delivering an electric shock to the heart to eliminate fibrillation, for example, when a patient's heart goes into fibrillation. By attaching electrodes (pads) connected to this item to the patient's chest, the patient's electrocardiogram is automatically analyzed, and defibrillation is performed as needed. The central panel may have a display unit as shown in Reference Figure 1, which shows the state of use, or it may not have a display unit as shown in Reference Figure 2, which also shows the state of use.

A wearable optical sensing device and methods are disclosed for concurrently deriving photoplethysmography (PPG) parameters and detecting tissue micromotions using the same optical modules. An emitter illuminates tissue and a photodetector produces signals that are demodulated subtraction synchronized to a pulsed drive. A signal processor separates the demodulated stream into bands, computing PPG parameters from about 0.5–4 Hz and a micromotion index from about 4–12 Hz (e.g., 4–6 Hz and 8–12 Hz). The optical modules may operate in reflective and / or transmissive geometries around a finger ring; other form factors are supported. Multi-wavelength operation (e.g., green, red and / or near-infrared) and / or differential photodetectors enable suppression of blood-volume pulsatility to enhance sensitivity to geometry-driven path-length modulation associated with micromotion. Optional inertial gating reduces artifacts from gross motion. An adaptive controller adjusts LED power, duty cycle, sampling, and pairing to maintain SNR. Metrics are logged or transmitted and may trigger user feedback.

Methods and computer systems are described that classify a cardiogram as being an atrial fibrillation (AF) or ventricular fibrillation (VF) cardiogram, automatically detect an AF epoch within an AF cardiogram, and automatically detect a VF epoch within a VF cardiogram. A classification and identification (C&I) system includes a classification system, an AF identification system, and a VF identification system. The C&I system processes cardiograms collected from patients to classify the cardiograms as being AF cardiograms or VF cardiograms and to identify AF epochs within the AF cardiograms or VF epochs within the VF cardiograms. The C&I system may then identify an AF source location of an AF based on the AF epochs and a VF source location of a VF based on the VF epochs. The C&I system may display a graphic of a heart that includes an indication of a source location.