40 results about "Cardiac zone" patented technology

A method of obtaining an electrocardiograph (ECG) of a patient located in a turbulent electromagnetic environment. The method includes recovering an ECG signal from a patient. The signal, including added noise, is recovered near the cardiac region as the differential signal resulting from signals delivered by two electrodes forming part of a first measurement loop. The signal further consists of simultaneously recovering from the patient a second measurement signal incorporating at least the noise, as a differential signal resulting from the signals delivered by two electrodes forming part of a second measurement loop distinct from the first measurement loop. Then, the second measurement signal is added or subtracted from the first noisy ECG signal, in real time. The second measurement signal is as a function of the polarity of the noise in the second signal relative to the noise in the first noisy ECG signal. The resulting signal is processed, converted, transmitted and displayed in real time representing the ECG essentially devoid of noise.

The invention concerns a method for culturing cells derived from the adipose tissue and in particular the stromal vascular fraction (SVF) to induce formation of cardiomyocytes, the use of the cells obtained by said culture method to reconstitute an ischemized cardiac zone, in particular following an infarction, as well as a pharmaceutical composition containing said cells. The method for obtaining cardiac cells comprises at least the following steps: a) selecting cardiomyogenic cells from the stromal vascular fraction (SVF); b) culturing the cells selected at step a) in a liquid medium optimized for expanding ex vivo the cardiomyogenic cells; c) maintaining and expanding said cells by successive passes in the liquid medium; and d) obtaining cardiac cells.

An electrical impedance tomography (EIT) device (30) with an electrode array (33), with a measured value acquisition and feed unit (40), with a computing/control unit (70) and with a data input unit (50). The computing/control unit (70) coordinates the operation and the data acquisition of EIT data (3) and is configured to identify a heart region.

The embodiment of the invention provides an ultrasonic image processing method and equipment. The method comprises the following steps: acquiring a four-cavity heart standard section ultrasonic image of a fetus; obtaining a thoracic cavity area and a heart area from the four-cavity heart standard section ultrasonic image; automatically determining at least one of an area of the thoracic cavity region and the heart region, a girth of the thoracic cavity region and the heart region, and a transverse diameter of the thoracic cavity region and the heart region; a cardiothoracic ratio of the fetus is automatically determined based on at least one of an area of the thoracic and cardiac regions, a girth of the thoracic and cardiac regions, and a transverse diameter of the thoracic and cardiac regions. According to the method provided by the embodiment of the invention, the automatic measurement of the heart-chest ratio of the fetus is realized based on the ultrasonic image of the fetus, the operation is simplified, and the working efficiency of a clinician is improved.

The invention discloses a regulating system of an arrhythmia radio frequency catheter. The regulating system comprises a signal acquisition module, a signal processing module, an amplifier module, a display module, a power selection module and an ablation electrode, wherein the signal acquisition module is used for acquiring an impedance signal of a heart, the impedance signal is amplified by virtue of the amplifier module and is transmitted to the signal processing module, the signal processing module is used for processing and calculating the signal so as to obtain impedance information, and the power selection module is used for selecting working power of the ablation electrode according to a processing result of the signal processing module; and the display module is used for displaying a heart impedance result and the working power of the ablation electrode, and the ablation electrode is used for carrying out ablation treatment on a heart region. The regulating system disclosed by the invention can detect impedance of a focus region in real time, judge an impedance value and carry out ablation on the focus region, so that the aim of continuous ablation of the radio frequency catheter is achieved, and a treatment effect is improved.

An implantable system for stimulating a heart contains a processor, a memory, a stimulator, and a first detection unit for detecting a cardiac rhythm disturbance of a cardiac region. The memory includes a computer-readable program, which prompts the processor to carry out the following steps: a) detecting via the first detection unit whether a cardiac rhythm disturbance is present in a cardiac region of a heart of a patient; b) when a cardiac rhythm disturbance is present, selecting a stimulation strategy based on a selection criterion; c) stimulating the cardiac region in which the cardiac rhythm disturbance was detected by way of the stimulator, using the selected stimulation strategy; d) detecting a success and/or an efficiency of the conducted stimulation; e) comparing the success and/or the efficiency to a predefinable success and/or efficiency criterion; and f) if the predefinable success and/or efficiency criterion was not achieved, optimizing the stimulation strategy.

The invention relates to a heart image acquisition method and device, magnetic resonance equipment and a storage medium. The method comprises the following steps: acquiring a preset excitation space of a target scanning layer of a heart area, determining a target radio frequency pulse according to parameters of the preset excitation space and a preset gradient, exciting the preset excitation space by using the target radio frequency pulse, sampling the excited excitation space, filling a two-dimensional k space with sampling points, and obtaining a target scanning layer of the heart area; according to the method, the two-dimensional k space is subjected to image reconstruction to obtain the magnetic resonance heart image, the size of the original view space is reduced, it is ensured that the image in the systolic period can be scanned, and the two-dimensional k space is selected, so that motion artifacts generated during systole when a traditional three-dimensional k space is excited for scanning can be avoided.

The invention provides a use method of a radiofrequency ablation device. When a catheter radiofrequency ablation operation is started, the initial impedance value of the heart of a patient is detected and recorded as a, the change impedance value on a radiofrequency ablation instrument is set as b, and the change time zone on the radiofrequency ablation instrument is set as c; in the catheter radiofrequency ablation operation process, the heart impedance change rate delta d of the patient on the radiofrequency ablation instrument is observed in real time; when the catheter for catheter radiofrequency ablation performs continuous radiofrequency ablation on the heart of the patient, when the time is not longer than the change time zone c and the change rate delta d of the impedance value of the heart of the patient in real time is larger than the change impedance value b, the radiofrequency ablation action is stopped immediately; after ablation is stopped, the position of the catheter for catheter radiofrequency ablation in the heart continues to be transferred, and the heart area where the change rate delta d of the real-time patient heart impedance value is larger than the change impedance value b is avoided. According to the method, tiny gas explosion of heart tissues can be avoided, and the operation safety is improved.

Conduction velocity information for a cardiac region can be used to map the cardiac muscle fiber orientation of that region. In particular, for a plurality of locations within the cardiac region, a relationship between a local conduction velocity, a maximum local conduction velocity within the region, and a minimum local conduction velocity within the region is used to determine the cardiac muscle fiber orientation at the respective location. Even more particularly, when the local conduction velocity at the respective location equals the maximum local conduction velocity, the cardiac muscle fiber orientation is parallel to a direction of a conduction velocity vector at the respective location, and when the local conduction velocity at the respective location equals the minimum local conduction velocity, the cardiac muscle fiber orientation is perpendicular to a direction of a conduction velocity vector at the respective location.

The present invention relates to image processing devices and related methods. The image processing device (10) comprises a data input (11) for receiving spectral computed tomography volumetric image data organized in voxels. The image data comprises a contrast-enhanced volumetric image of a cardiac region in a subject's body and a baseline volumetric image of that cardiac region, e.g. a virtual non-contrast image, wherein the contrast-enhanced volumetric image conveys anatomical information regarding coronary artery anatomy of the subject. The device comprises a flow simulator (12) for generating, or receiving as input, a three-dimensional coronary tree model based on the volumetric image data and for simulating a coronary flow based on the three-dimensional coronary tree model. The device comprises a perfusion synthesis unit (13) for generating a perfusion image representative of a blood distribution in tissue at at least one instant in time taking at least the baseline volumetric image and said coronary flow simulation into account.