1694 results about "Cardiac Ventricle" patented technology

The present disclosure relates to a method for detecting a state of wear of a cardiac support system. The method comprises a read-in step and a determination step. During the read-in step, a sensor signal representing an operating state of the cardiac support system is read in. During the determination step, a wear signal is determined using the sensor signal and a comparison rule. The wear signal represents the wear condition.

The invention discloses a test system and method for an artificial heart valve implant, and relates to the technical field of medical instrument detection. The system comprises a ventricle simulator, an atrium simulator, a circulation loop, a high-speed camera and a laser generator, wherein an artificial heart valve is arranged in the high-transparency compliance valve testing cavity, and the circulation loop is composed of a blood vessel compliance simulator and a blood vessel damping simulator. The circulation loop simulates a blood flowing environment for the artificial heart valve, and a flowing medium is added with tracer particle turbid liquid; the ventricle simulator, the atrium simulator, the vascular damper and the vascular compliance simulator respectively provide power, storage space, resistance and pulse pressure for the flowing medium; and the laser generator and the high-speed camera act together to obtain a particle image behind the artificial heart valve. The particle image is uploaded to a computer for heart valve pulsating flow field visualization analysis based on the digital particle image velocity measurement technology, and therefore quantitative analysis of the risk after the heart valve is implanted into the expected position is achieved.

The invention relates to a method for operating an implanted, ventricular assist system (2), comprising the following steps: a) determine a first impedance parameter at a first point in time by means of the assist system (2), b) determine a second impedance parameter at a second point in time by means of the assist system (2), c) at least determine a change of the impedance parameter using the first impedance parameter and the second impedance parameter, or compare at least the first or second impedance parameter to a threshold value.

Apparatus and methods are described including a ventricular assist device that includes a frame having struts that define a plurality of cells. In its non-radially-constrained configuration, the frame includes a generally cylindrical portion. A tube defines blood outlet openings, and a portion of the tube is disposed outside the frame and is coupled to the generally cylindrical portion of the frame, such that the portion of the tube conforms with a structure of struts of the frame. An inner lining is coupled to an inside of the generally cylindrical portion of the frame, such as to provide the generally cylindrical portion of the frame with a smooth inner surface. An impeller is disposed at least partially inside the generally cylindrical portion of the frame and is configured to pump blood through the tube and out of the one of more blood outlet openings. Other applications are also described.

Physiological monitoring can be provided through a lightweight wearable monitor that includes two components, a flexible extended wear electrode patch and a reusable monitor recorder that removably snaps into a receptacle on the electrode patch. The wearable monitor sits centrally on the patient's chest along the sternum oriented top-to-bottom. The placement of the wearable monitor in a location at the sternal midline, with its unique narrow “hourglass”-like shape, significantly improves the ability of the wearable monitor to cutaneously sense cardiac electrical potential signals, particularly the P-wave and the QRS interval signals indicating ventricular activity in the ECG waveforms. In particular, the ECG electrodes on the electrode patch are tailored to be positioned axially along the midline of the sternum for capturing action potential propagation in an orientation that corresponds to the aVF lead used in a conventional 12-lead ECG that is used to sense positive or upright P-waves.

Implants, implant systems, and methods for treatment of mitral valve regurgitation and other valve diseases generally include a coaptation assist body which remains within the blood flow path as the leaflets of the valve move, the valve bodies often being relatively thin, elongate (along the blood flow path), and / or conformable structures which extend laterally from commissure to commissure, allowing the native leaflets to engage and seal against the large, opposed surfaces on either side of the valve body during the heart cycle phase when the ventricle contracts to empty that chamber of blood, and allows blood to pass around the valve body so that blood flows from the atrium to the ventricle during the filling phase of the heart cycle. Separate deployment of independent anchors near each of the commissures may facilitate positioning and support of an exemplary triangular valve body, with a third anchor being deployed in the ventricle. An outer surface of the valve body may accommodate tissue ingrowth or endothelialization, while a fluid-absorbing matrix can swell after introduction into the heart. The valve body shape may be selected after an anchor has been deployed, and catheter-based deployment systems may have a desirable low profile.

The present disclosure provides a method and system for analyzing unipolar electrophysiological (EP) signals acquired by a multi-electrode catheter placed in a ventricle of a patient's heart. The method includes receiving unipolar EP signals, extracting unipolar far-field signals from the unipolar EP signals, and analyzing the extracted unipolar far-field signals to estimate the distribution of scar regions across a thickness of wall tissue of the ventricle. Using the estimated distribution, a unipolar far-field EP map showing the scar regions is generated. The method further includes displaying the unipolar far-field EP map including the scar regions to a user. The system comprises a display device and a processor configured to perform the steps of the method.

The invention belongs to the technical field of medical image processing, and particularly relates to a double-encoder semi-supervised heart MRI double-ventricle segmentation method based on improved SAM. A teacher model and a student model which are used both comprise double encoders, prompt encoders and mask decoders, each double encoder comprises a ViT branch and a CNN-Mama branch which are parallel, parameter fine tuning of the ViT branch is realized through a position adapter and a feature adapter, the CNN-Mama branch mainly comprises a convolution fusion Mama block and a second-order dimension attention block, and the CNN-Mama branch is used for realizing fine tuning of parameters of the CNN-Mama block. The convolution fusion Mama block introduces an enhanced convolution block on the basis of a VSS block, and the second-order dimension attention block uses a covariance matrix to mine second-order statistical information of data; carrying out weighted summation on the output features of the ViT branch and the CNN-Mama branch to obtain the output features of the double encoders; the output features of the double-encoder and the prompt encoder are input into a mask decoder to be decoded, and a segmentation result is obtained; and performing joint training on the teacher model and the student model based on interpolation consistency regularization semi-supervision, and using the trained student model as a segmentation model for double-ventricle segmentation of heart MRI. The segmentation model has strong feature extraction capability, can effectively extract the edge information of the ventricles and the boundary information of the double-ventricle connection region, and improves the segmentation precision.

The invention discloses an artificial biological heart valve device, and relates to the technical field of heart surgeries. Valve leaflets are fixedly mounted on a supporting assembly, so that the valve leaflets are supported and limited; the first edge (supporting wall 42) of the suture ring is used for suturing and fixing with the supporting assembly, and the second edge (suturing wall 41) is used for suturing with the tissue ring; the wall face of the suture ring has extension in the axial direction, so that an axial distance exists between the first edge (supporting wall 42) and the second edge (suture wall 41), the first edge (supporting wall 42) is located outside the ventricle, the wall face of the suture ring supports the supporting assembly in the axial direction, and the supporting assembly is made to be away from the ventricle by means of the extension size of the wall face of the suture ring in the axial direction. By the adoption of the structure, the thickness of the suture ring does not need to be additionally increased, and the axial position of the supporting assembly cannot be affected during suture and tensioning.

The invention relates to an electronics module (102) for a ventricular assist device, wherein the ventricular assist device has a motor housing for accommodating a pump motor. The electronics module (102) comprises an electronics section (204) for accommodating at least one electronic component (206) and / or at least one electrically conductive contacting element (208), and a coupling section (202) designed as a joint between the motor housing (104) and the electronics section (204) or as a separate component to be joined, wherein the motor housing (104) and the electronics section (204) are combined or can be combined via the coupling section (202) with one another to form a fluid-tight module housing (104) to be arranged in a blood vessel.

Apparatus and methods are described including delivering a left-ventricular assist device to a subject's aorta. The device including a distal-tip element that defines a straight proximal portion, and a curved distal portion, the curved distal portion defining first and second curves with an elongated straight portion between the first and second curves. The distal-tip element is centered with respect to the aortic valve using the curved distal portion of the distal-tip element, to thereby guide the device through the subject's aortic valve atraumatically. A pump pumps blood through from the subject's left ventricle to the subject's aorta. Other applications are also described.

Apparatus and methods are described including delivering a left-ventricular assist device to a subject's left ventricle. A tube is positioned such that a proximal portion of the tube traverses an aortic valve of the subject, and a distal portion of the tube is disposed within a left ventricle of the subject. A pump pumps blood through the tube from the subject's left ventricle to the subject's aorta such as to cause the proximal portion of the tube to be maintained in an open state, and to cause at least a portion of the tube to become curved. Other applications are also described.

The invention relates to the technical field of heart blood pumps, in particular to a passive ventricular auxiliary circulation device. Comprising a motor body shell, a stator and a rotor are arranged in the motor body shell, and one of the stator and the rotor comprises a coil; the axial flow channel shell is sleeved; the upper end of the axial flow channel shell is configured to face the aortic valve to the lower part of the ventricle, and a power supply configured to be operably coupled to the coil; and the controller is configured to be operated and coupled to the power supply to select and control the power supply to change the rotor to a certain rotating speed in a manual selection mode, then the rotor keeps working in a certain rotating speed mode, and corresponding auxiliary pressure output by the fluid outlet interface is configured at a different rotating speed. The device is controlled to be in a rotating speed state, and when systolic pressure smaller than normal systolic pressure is provided for cardiac pulsation of a heart failure patient, the normal systolic pressure is provided when the systolic pressure and auxiliary pressure are overlapped together, so that the heart failure patient maintains the normal systolic pressure.

The invention relates to a sensor head device for a heart support system, wherein the sensor head device has at least one sensor carrying element, wherein the sensor carrying element has at least one sensor cavity for accommodating at least one sensor and / or at least one signal transmitter cavity for accommodating at least one signal transmitter.

Apparatus and methods are described including a ventricular assist device that includes an impeller configured to be placed inside a left ventricle of a subject. A driving magnet is coupled to a motor and is rotated by the motor. A driven magnet is magnetically coupled to the driving magnet and is rotated by the driving magnet. A drive cable extends from the driven magnet and imparts rotational motion from the driven magnet to the impeller. A set of sensors is configured to detect a magnetic phase difference between the driven magnet and the driving magnet. A computer processor receives the detected magnetic phase difference and determines a physiological parameter of the subject, at least partially in response thereto. Other applications are also described.

Method and systems are provided for characterizing blood flow in an atrioventricular valve of the human heart, the atrioventricular valve connecting an atrium with a corresponding ventricle of the heart, the ventricle being fluidly coupled to a particular vessel that transports blood outside the ventricle blood, which involve obtaining image data of the heart and identifying contours of the atrium and a region within the particular vessel within the image data. A time-density curve for the atrium can be calculated from the contour of the atrium and densitometric image data derived from the image data. A time-density curve for the region of the particular vessel can be calculated from the contour of the vessel region and the densitometric image data. Data that characterizes at least one regurgitation fraction related to the atrioventricular valve can be calculated from such time-density curves.

The invention relates to an apparatus (100) for anchoring a ventricular assist system in a blood vessel, the apparatus (100) being able to assume an insertion state for insertion of the ventricular assist system into the blood vessel, and the apparatus (100) being able to assume an anchoring state in order to anchor the ventricular assist system in the blood vessel. The apparatus (100) has at least one fixing means (105) for fixing the apparatus (100) to the ventricular assist system (205), a crown (110) and a connection means (115). The crown (110) is formed from at least one unfolding element (120). The unfolding element (120) is designed to unfold during the transfer from the insertion state into the anchoring state in order to enlarge the diameter of the crown (110) so as to anchor the apparatus (100) in the blood vessel. The connection means (115) is designed to connect the crown (110) to the fixing means (105).

The invention provides a monitoring method and system for a ventricular assist device and a computer readable storage medium. The monitoring method comprises the steps of judging whether an adverse event occurs in the ventricular assist device or not based on torque current of a motor of the ventricular assist device, and judging the type of the adverse event. The method has the characteristics of simplicity, feasibility and high accuracy.

The invention relates to the technical field of heart blood pumps, in particular to a valve and pump integrated tandem type ventricular auxiliary circulation device. Comprising a ventricular auxiliary circulating pump device and a ventricular auxiliary circulating valve device, the ventricular auxiliary circulating pump device is provided with an axial flow channel shell (3) and a power part arranged in the axial flow channel shell (3); the ventricular auxiliary circulation valve device is provided with a tubular metal support body (100), and the metal support body comprises a plurality of longitudinal supporting columns; the upper end of the axial flow channel shell (3) is provided with a flanging part (31) which is outward in the radial direction, and the longitudinal supporting column lower tail end (101) of the longitudinal supporting column is assembled, contacted and fixed to the flanging part (31). A supporting system and a heat dissipation system are constructed to be of the same path structure, and the heat dissipation effect is improved on the basis that the structure is reduced.

Methods and systems for automated electrocardiogram (ECG) analysis using neural networks, enhancing the accuracy of beat-by-beat cardiac monitoring. The system utilizes a Generative Adversarial Network (GAN) and beat classifiers to analyze ECG data and detect conditions various beast properties of an ECG at a discrete level. Additional neural networks may be trained to detect beat based conditions such as premature atrial contractions (PACs) and premature ventricular contractions (PVCs). The GAN generates realistic ECG beats, while classifiers detect abnormalities. Additional transformers may be trained to detect rhythm based conditions such as AFib and Aflutter. Methods and Systems support real-time cardiac health insights and integrates with ECG devices for continuous monitoring, offering a robust solution for improving diagnostic accuracy.

To provide a system for transmitting blood pressure reduction electrical stimulation to the heart of a patient capable of determining a desirable AV delay.SOLUTION: The atrium is paced and the ventricle is paced with a given (arbitrary) delay to obtain a desired blood pressure change. Then, the atrium is sensed, the ventricle is paced, the blood pressure change is observed, and the resulting blood pressure change is compared with the paced-atrium-paced-ventricle desired blood pressure change. In the case where the blood pressure changes are not substantially equal, the timing of the sensed-atrium-paced-ventricle stimulation is adjusted on the basis of the comparison. The new modified resulting blood pressure change is observed, and the modified blood pressure change is compared with the paced-atrium-paced-ventricle desired blood pressure change. Adjustment and observation may be repeated until the timing of the sensed-atrium-paced-ventricle stimulation achieves the same blood pressure change as the desired blood pressure change of the paced-atrium-paced-ventricle stimulation.SELECTED DRAWING: Figure 9

The present disclosure provides systems and methods for a replacement mitral valve. The replacement valve may be made of a less rigid material thereby allowing the packed diameter of the replacement valve to be decreased. The less rigid replacement mitral valve may include a ventricular portion and a central portion. The ventricular portion may include a guide channel. A wire may be advanced into the guide channel. The wire in the guide channel may increase the stiffness on the ventricular side of the replacement valve. The increased stiffness may prevent the replacement valve from collapsing through a native valve annulus.

A first ventricular surface anchor may be placed against the first right ventricular surface, where the first ventricular surface anchor is connected to a first tension member. A first tension anchor against a tension anchor surface of the heart wherein the first tension anchor is connected to a second tension member. The first tension member connected to the first ventricular surface anchor may extend toward the second tension member connected to the first tension anchor; and the first tension member and the second tension member may drag the first right ventricular surface toward the first tension anchor. The surface anchor may include a nitinol frame and an aperture forming an outer perimeter. When the temperature of the nitinol frame is a body temperature, the nitinol frame may have an austenitic state in a deployed configuration. The surface anchor may also include a grommet including a distal tubular portion connected to a proximal finger portion.

For repairing a valve situated between an atrium and a ventricle of a heart of a subject, and having a first leaflet and a second leaflet, apparatus is provided that includes an implant and a delivery tool. The implant includes a flexible patch defining slots along an edge of the patch; a first anchor; and a second anchor. The delivery tool is adapted to transluminally deliver the implant to the heart; and implant the implant in the ventricle by securing the patch against a ventricular surface of the first leaflet by anchoring the first anchor to the first leaflet, and against a ventricular surface of the second leaflet by anchoring the second anchor to the second leaflet, such that (i) chordae of the valve extend through the slots, and (ii) the patch bridges a gap between the first leaflet and the second leaflet. Other embodiments are also disclosed.

The invention provides an echocardiogram video abstraction method based on a hierarchical space-time attention mechanism, and the method comprises the steps: obtaining an echocardiogram, inputting the echocardiogram into an anatomy and physiological basic model of a key frame recognition task, and obtaining key frame information; inputting the key frame information into a multi-dimensional spatial-temporal feature extraction model to obtain feature information and frequency domain information; fusing the feature information and the frequency domain information; performing key frame enhancement processing on the fusion information by adopting an SE channel attention mechanism to obtain key frame anatomical feature expression; processing the key frame anatomical feature expression by adopting a key frame backtracking strategy and a classification network to obtain a key frame identification classification result; performing left ventricle segmentation on the classified image by adopting an improved U-Net left ventricle region segmentation network; estimating the area and volume of the left ventricle based on a segmentation result; fusing the estimated left ventricular area and volume by adopting a hierarchical attention mechanism and a cross-layer information fusion strategy to obtain a ventricular volume result; according to the method, through abstract extraction of the key information of the ultrasonic cardiac video, the clinical practicability of intelligent screening and auxiliary diagnosis of cardiovascular diseases based on ultrasonic is improved.

Devices, systems and methods deliver implantable medical devices for atrioventricular (VfA) cardiac treatment. The VfA device can be implanted in the right atrium (RA), where electrodes extend from the right atrium into the left ventricular myocardium. A flexible lead or other probe can be advanced to a potential implantation site and used to identify the precise location of an implanted medical device, such as an electrode, a small lead, a lead, or an intracardiac device. Some methods may include locating a potential implantation site in the Koch triangle in the right atrium of the patient's heart; attaching a retaining sheath to the right atrial endocardium of the potential implantation site; and implanting the medical device via a guidewire at the potential implantation site. An implantable medical device may include an intracardiac housing and a small lead that can be delivered by these methods.

A method and apparatus for treatment of hypertension and heart failure by increasing secretion of endogenous atrial hormones by pacing of the heart. Pacing is done during the ventricular refractory period resulting in premature atrial contraction that does not result in ventricular contraction. Pacing results in the atrial wall stress, peripheral vasodilation, ANP secretion. Concomitant reduction of the heart rate is monitored and controlled as needed with backup pacing.

The invention provides a self-adaptive control method and device. The method comprises the steps that multiple pumping flows of a ventricular assist device during operation at a first rotating speed in a first period are obtained; first duration and second duration are recorded, the first duration is the duration of the interval between the adjacent first pumping flow, the second duration is the duration from the first pumping flow to the pumping flow smaller than a first flow threshold value in the first duration, and the first pumping flow is the peak value of the pumping flow of the ventricular assist device; if the first rotating speed is adjusted according to the target ratio, the target ratio is the ratio of the second duration to the first duration. The cardiac cycle of the user and the low flow value of the ventricular assist device can be determined according to the first duration and the second duration respectively, and the rotating speed of the ventricular assist device is adaptively adjusted according to the ratio of the second duration to the first duration, so that the pumping flow of the ventricular assist device can meet the requirements of the user in real time; abnormalities of the ventricular auxiliary device are reduced, and therefore the safety of a user is improved.

A prosthetic heart valve includes a collapsible and expandable outer frame, a collapsible and expandable inner frame, and a prosthetic valve assembly. The outer frame may be configured to engage tissue of a native heart valve, and may have (i) an atrial portion adapted to be positioned on an atrial side of the native heart valve; (ii) a ventricle portion adapted to be positioned on a ventricle side of the native heart valve; and (iii) a narrowed waist portion between the atrial portion and the ventricle portion. The inner frame may be positioned radially inward of the outer frame and may be coupled to the outer frame. A constraining band may extend around a circumference of the inner frame. The prosthetic valve assembly may be coupled to, and positioned radially inward of, the inner frame.

A prosthetic heart valve for treatment of a diseased heart valve having native anterior and posterior leaflets that move between an open configuration and a closed position to regulate blood flow through the heart valve during a cardiac cycle of a heart. The prosthetic heart valve having a crescent shaped stent, at least one prosthetic leaflet mounted on an inner surface of the stent, and at least one prong structure coupling a portion of the at least one prosthetic leaflet to a lower ventricular portion of the stent frame. The prosthetic heart valve further having systems for anchoring the upper flared portion of the stent to a posterior portion of the native valve annulus.