19 results about "Cardiac surface" patented technology

The invention discloses an ultrasonic imaging system and method based on a heart surface, a medium and a product, the system comprises an ultrasonic detection assembly and an imaging terminal which are in communication connection, an ultrasonic transducer is packaged at the head end of an attached ultrasonic probe in the ultrasonic detection assembly, and an acoustic window on the ultrasonic transducer is planar; the ultrasonic transducer is used for being attached to the surface of the heart or the aorta, and the plane of the ultrasonic transducer is parallel to the plane of the acoustic window; and the imaging terminal is used for generating a sound velocity mask pattern according to the reference ultrasonic image, determining echo time delay data according to the sound velocity mask pattern, synthesizing and reconstructing the radio frequency signal data according to the echo time delay data to obtain an ultrasonic image, performing motion compensation on the image sequence, performing multi-modal fusion on the ultrasonic image subjected to motion compensation, and obtaining a final ultrasonic image. The problem of acoustic interference of anatomical structures such as the chest wall and the esophagus in a traditional echocardiography technology is solved, and real-time and high-quality image support is provided for cardiac surgery.

A method includes receiving a plurality of data points including electrical activation (EA) values measured at respective positions in at least a portion of a surface of a cardiac chamber of a heart of a patient. Using a predefined EA value criterion, the EA values in a given region of the cardiac surface are classified into multiple distinct EA wave-fronts, and multiple layers of EA values are calculated for the given region, wherein each EA layer includes the EA values found to belong to a respective and contiguous EA wave-front. The multiple EA layers are overlayed on a graphical representation of the surface. The graphical representation with the multiple overlaid EA layers is displayed to a user, with a graphical indication distinguishing between the multiple EA layers.

The application provides a kind of based on augmented reality navigation heart blood flow imaging system and navigation image generation method, it is related to biomedical optical imaging technical field, the system includes: laser speckle image acquisition unit according to electrocardiogram ECG signal determines acquisition window, and after the imaging focus is actively compensated based on real-time ranging result in the acquisition window, laser speckle image sequence of heart surface is collected;Navigation image generation unit quantifies the degree of stenosis of blood vessel according to blood flow index, and generates blood flow navigation image in combination with laser speckle image sequence;Navigation image projection unit projects blood flow navigation image to the corresponding blood vessel area of heart surface.The application provides based on augmented reality navigation heart blood flow imaging system and navigation image generation method, not only realizes high-fidelity, quantitative blood flow imaging and intuitive, in situ surgical navigation integration, also significantly improves the precision and safety of coronary artery bypass grafting and other heart surgery.

The invention provides a novel heart surface temperature auxiliary sensing device, and relates to the technical field of heart surgical instruments. One end of the bottom of the adjustable supporting mechanism is connected with the bottom fixing assembly; one side of the connecting line storage mechanism is connected with the adjustable supporting mechanism; the power transmission mechanism is mounted on one side of the connecting wire storage mechanism; the auxiliary cleaning assembly is connected with the power conveying mechanism. The problems that when a medical worker manually penetrates an inductor through a chest wall incision at a certain angle and advances the inductor, operation is troublesome, and stability is poor are solved; the reserved line is long and is easy to be interfered by external factors and touched by mistake; the angle can be adjusted and fixed, and the induction circuit can be conveniently inserted; the induction plug wire can be controlled to be stably inserted into a chest wall incision of a patient; the induction circuit can be controlled to be bent and straightened, line conveying and recycling are matched, mistaken touch is avoided, and the surface of the induction circuit can be automatically cleaned and disinfected.

The invention discloses an implantable electromagnetic probe system which comprises a shielding shell which is implanted, sewn and fixed in a body. The electromagnetic probe unit is installed in the shielding shell, and the electromagnetic probe unit comprises an outer electrode extending to the surface of the heart; the wireless communication module is electrically connected with the electromagnetic probe unit and communicates with external equipment; the power module is used for being connected with the electromagnetic probe unit or the wireless communication module, the shielding shell can be implanted and sewn into a human body, the electromagnetic probe unit can be connected with human tissue through a sewn part, it is ensured that the probe is stably placed and can work for a long time, and a shielding space can be formed in the shielding shell; the electromagnetic probe unit can be shielded through the shielding shell, so that the electromagnetic probe unit is not interfered by external signals when working.

A method includes receiving a plurality of data points including electrical activation (EA) values measured at respective positions in at least a portion of a surface of a cardiac chamber of a heart of a patient. Using a predefined EA value criterion, the EA values in a given region of the cardiac surface are classified into multiple distinct EA wave-fronts, and multiple layers of EA values are calculated for the given region, wherein each EA layer includes the EA values found to belong to a respective and contiguous EA wave-front. The multiple EA layers are overlayed on a graphical representation of the surface. The graphical representation with the multiple overlaid EA layers is displayed to a user, with a graphical indication distinguishing between the multiple EA layers.

This invention provides a nucleic acid aptamer that specifically binds to the surface of the heart, its preparation method, and its application, belonging to the field of molecular biology. The nucleic acid aptamer sequence of this invention is the DNA sequence shown in SEQ ID NO: 1. This invention also includes single-stranded DNA molecules with the same specific recognition function obtained by modifying, deleting, adding, or substituting bases on the nucleic acid aptamer sequence of this invention. The nucleic acid aptamer obtained by this invention possesses high specificity and affinity.

The invention discloses an electrocardiosignal visualization method and related equipment, and relates to the field of electrocardiosignal analysis. According to the method, body surface voltage feature vectors of at least one target moment are obtained from an electrocardiogram, a configured potential estimation model is called, each body surface voltage feature vector is processed, and heart surface electrical excitation intensity distribution of each target moment is obtained. And based on the heart surface electrical excitation intensity distribution at each target moment, rendering the heart three-dimensional model to obtain a target heart three-dimensional model corresponding to each target moment. According to the method, the target heart three-dimensional model of the heart electrical excitation state can be displayed, a user can conveniently and visually observe the process of heart electrical excitation from origin to conduction in the time period of electrocardiogram detection, and the abnormal electrical excitation part of the heart is judged in combination with the diagnosis result of the electrocardiogram.

A cardiac support device comprising an implant with a shell (21), wherein the cardiac support device is an active cardiac support device comprising at least one expandable unit (23), wherein the shell (21) has a structured surface (22) that promotes tissue ingrowth, wherein the structured surface is located on the outer, non-cardiac surface of the shell, and wherein the tissue-stiffened shell (21) forms a support for the at least one expandable unit (23).

The application discloses a ventricular pre-excitation demonstration model in the technical field of ventricular pre-excitation models, which comprises normal conduction lamp strips, knob switches, bypass conduction lamp strips, a base and a heart model. The base is a stable supporting box body, the heart model is stably arranged on the top of the base, the anterior surface of the atrium of the heart model is a cross section, the ventricle of the heart model is a complete hemispherical model, the cross section of the heart model faces forward, and the electrocardio conduction of the sinoatrial node in the heart model can be emitted and conducted to the conduction range of the surface of the heart model from inside to outside and from a part to the whole, so that the electrocardio conduction path is directly and visually displayed, students can directly and visually observe the conduction path and range of the ventricular pre-excitation, the display state is that the lamp beads flicker and move on the lamp ring, the moving process of the electrocardio conduction path can be vividly displayed, and the corresponding electrocardiogram can be displayed on the display screen, and the teaching is clearer and simpler.

In a described example, a method includes selecting a first time interval that includes first electrophysiological signals with ectopic activity, in which the electrophysiological signals represent electrophysiological signals measured at respective measurement locations distributed across a patient's body. The method also includes aligning the first electrophysiological signals with respective template signals to provide aligned pairs of signals for at least some measurement locations, in which the template signals electrophysiological signals without the ectopic activity for at least some of the respective measurement locations. The method also includes subtracting the template signal from the first electrophysiological signal in each aligned pair of signals to provide ectopic data representative of the ectopic activity in the first time interval for the respective locations. The method also includes reconstructing the electrogram on the cardiac surface and generating an output to identify a location for the ectopic activity based on the ectopic data.

A method for the automated detection of sites of latest electrical activation of the human heart, envisages: constructing a number of isopotential maps associated with the electrical potential distribution on the surface of the heart in respective times within a processing period occurring near the end of the ventricular or atrial depolarization; processing the isopotential maps to identify regions of maximal positive electrical potential; determining the barycenters of the identified regions; and localizing the site of latest heart electrical activation based on, in particular as an average of, the determined barycenters.

Disclosed are devices, systems, and methods for determining the dipole densities on a cardiac surface using electrodes positioned on a torso of a patient.

The invention belongs to the field of medical surgical articles, and particularly relates to a viscous dressing for minimally invasive surgery, in particular to an epicardium flexible cooling patch for minimally invasive surgery and a use method of the epicardium flexible cooling patch. The epicardial flexible cooling patch comprises a heat absorption layer, a plurality of heat absorption capsules are arranged in the heat absorption layer; the adhesion layer is arranged on one side of the microcapsule layer, and the side, away from the heat absorption layer, of the adhesion layer is provided with a pasting face; wherein the heat absorption capsule comprises an inner cavity, an outer cavity and a diaphragm for separating the inner cavity from the outer cavity, and the inner cavity and the outer cavity are internally provided with a solvent and a heat absorbent respectively; the heat absorption layer and the adhesion layer are flexible layers; the heat absorption layer and the adhesion layer are in a curled state and are fed into the thoracic cavity through a minimally invasive wound, then the heat absorption layer and the adhesion layer are unfolded through operating forceps, then the flexible epicardium cooling patch is spread on the surface of the heart through the adhesion layer, and finally the heat absorption layer is slightly pressed through operating forceps tips so that the diaphragm can be damaged. The solvent in the inner cavity and the outer cavity is mixed and dissolved with the heat absorbing agent, and then heart surface heat is absorbed through the adhesion layer.

Embodiments described herein include devices, systems, and methods for reducing the distance between two locations in tissue. In one embodiment, an anchor may reside within the right ventricle in engagement with the septum. A tension member may extend from that anchor through the septum and an exterior wall of the left ventricle to a second anchor disposed along a surface of the heart. Perforating the exterior wall and the septum from an epicardial approach can provide control over the reshaping of the ventricular chamber. Guiding deployment of the implant from along the epicardial access path and another access path into and through the right ventricle provides control over the movement of the anchor within the ventricle. The joined epicardial pathway and right atrial pathway allows the tension member to be advanced into the heart through the right atrium and pulled into engagement along the epicardial access path.

The application discloses a modular artificial intelligence heart pneumatic function unit, which comprises an adjusting module and a plurality of pneumatic modules connected with the adjusting module, wherein the pneumatic module is a sandwich structure comprising an inner plate and an outer plate, the top ends of the inner plate and the outer plate are connected through a balloon, and the bottom ends are rotationally connected; a plurality of navigation guide wires and guide wire locks are mounted on the surface of the outer plate; the plurality of pneumatic modules are connected with a plurality of fixed pipes on a fixed metal ring, the fixed pipes are clamped with the top ends of the outer plates, and the fixed pipes are connected with the plurality of navigation guide wires; the adjusting module comprises an adjusting guide wire and an adjusting knob which are respectively mounted on the inside and the bottom of an adjusting rod, and the adjusting guide wire passes through the plurality of fixed pipes; the adjusting module is mounted on the outside of a heart apex cap, and the pneumatic module is clamped with the heart apex cap through a connecting plate; the modular pneumatic function unit is designed, and relevant parameters of the pneumatic function unit are adjusted, so that the pneumatic function unit is highly attached to the surface of the heart, and the best treatment effect can be achieved when the heart is assisted to contract and relax.

Embodiments of the present invention disclose a method and system for visualizing the depolarization of a heart as a wave across the surface of the heart while at the same time showing the underlying electrograms associated with the depolarization. Controls are provided to: start and pause the propagation (depolarization) animation, fast forward or rewind, reduce the speed from 1× to slower speeds, and select a subset of the signal for viewing.

The invention discloses an automatic grid generation and optimization method and system for a heart three-dimensional electrical conduction model, and the method comprises the steps: generating an initial heart surface grid Ms with physical consistency based on heart three-dimensional CT / MRI voxel data in combination with fiber direction information extracted by a diffusion tensor field; the electrical activity curvature is calculated, the initial heart surface grid Ms is divided into sub-regions, and a mixture grid Mh is generated; performing fiber grid alignment degree evaluation based on a continuous fiber field, and obtaining an optimized standard body grid M'through multi-objective optimization; calculating a local error field, and carrying out local mesh refinement on a high-error region to obtain an error optimization mesh M ''; monitoring grid quality and alignment indexes in real time, and performing local re-correction to obtain a local re-corrected grid Mu; according to the method, the problems of ambiguity, insufficient fiber fusion, precision-efficiency contradiction, long-term simulation quality attenuation and the like in traditional grid generation and maintenance can be solved, and the precision, stability and automation level of heart electrical conduction simulation are remarkably improved.