15 results about "Heart chamber" patented technology

A system includes an interface and a processor. The interface is configured to receive multiple electrophysiological (EP) signals from a tissue area along an ablation curve inside a cardiac chamber of a heart of a patient. The processor is configured to (i) generate local conduction vectors (LCVs) for the area based on the multiple EP signals, (ii) estimate a level of change between sets of LCVs along the ablation curve within the tissue area, and (iii) based on the level of change, identify a presence of a conduction gap in the ablation curve.#

At least some embodiments of the present disclosure are directed to a system for processing cardiac information. The system includes a processing unit configured to: receive one or more cardiac electrical signals from one or more electrodes disposed within a cardiac chamber, wherein the cardiac electrical signals are acquired during a cardiac beat; receive an indication of a measurement location corresponding to each of the cardiac electrical signals; analyze the one or more cardiac electrical signals to compute a plurality of duty cycle values, the computed duty cycle values corresponding to a plurality of preselected cycle length windows; and compute an average duty cycle value of the computed duty cycle values over the plurality of preselected cycle length windows.

Various embodiments of the present invention comprise a single-chamber collapsible and expandable prosthetic valve implant device with an elevated valve section and comprising the following capabilities: (1) preservation of native valve functionality; (2) initial preservation of native valve functionality with subsequent full replacement of native valve functionality; (3) full replacement of native valve functionality; and / or (4) mitigation of the prolapsing distance of the dysfunctional leaflets by preventing the anterior excursion of the prolapsing leaflets above the upper annular surface and into the left atrial chamber in order to preserve native leaflet functionality for as long as possible. The expanded and implanted device does not extend beyond the boundaries of the subject heart chamber, e.g., the left atrium, thereby enabling the preservation of any remaining native valve functionality with subsequent full replacement of native valve functionality if and when needed.

An implantable assembly suitable for remodeling a chamber of a heart in a patient is disclosed. The assembly is implanted with a tool having a tool proximal portion and a distal portion. The assembly includes a mobile anchor including an abutment portion adapted to abut against a wall of the chamber of the heart and a tether portion rotatably coupled to the abutment portion. Each of the abutment portion and the tether portion are configured to be independently coupled from the tool. The assembly further includes an interventricular septum anchor for coupling to a septum of the heart and a tether having a working portion extending between the mobile anchor and the septum anchor having a first length and a tether proximal portion having a second length. The abutment portion is releasably locked to the tether portion and is configured such that a preselected torque applied to the tether portion of the mobile anchor unlocks and causes relative rotation of the tether portion relative to the abutment portion.

A collapsible and expandable prosthetic mitral valve stent is provided with improved recapture into a distal lumen of a delivery sheath. Various embodiments comprise a valve support within the interior of a stent frame and defining a flow channel therethrough, wherein the top or upstream of the valve support comprises a row, or a plurality, of stent cells that are bent radially inward at least partially over the flow channel. Some embodiments may comprise a recapture assist mechanism, such as an open paddle, attached to one or more of the inwardly bent stent cells and adapted to receive and / or engage a wire to aid in positioning, expansion, recapture and / or implanting the device in a patient's heart chamber.

A method incudes receiving multiple tags along an ablation curve that covers a partial circumference over an inner wall of a cardiac chamber of a heart of patient. Using the tags, the ablation curve is completed to a full circumference over the inner wall to eliminate a conduction gap in the ablation curve.

A dual-chamber leadless pacemaker (LP) system includes a first leadless pacemaker (LP1) and a second leadless pacemaker (LP2), wherein LP1 is configured to be implanted in or on a first heart chamber and deliver pacing pulses to the first heart chamber, and LP2 is configured to be implanted in or on a second heart chamber and deliver pacing pulses to the second heart chamber. Information is obtained regarding the amplitude of the pacing pulses delivered by LP2 to the second heart chamber and / or the sensitivity of a sensing circuit of LP1, which is configured to be used by LP1 to detect the inherent depolarization of the first heart chamber. A crosstalk protection duration is determined based on at least some of this information, such that it is performed for an appropriate duration when crosstalk protection is executed.

The application discloses a kind of near-field coherent heart radio frequency sensing method and system based on code division multiple access, comprising: 4-way frequency f synchronous baseband signal is configured, 4-way synchronous chip is configured, synchronous baseband signal is multiplied with corresponding synchronous chip to modulate, and 4-way digital baseband signal is obtained;4-way digital baseband signal is handled to obtain 4-way heart measurement signal;4-way heart measurement signal is respectively transmitted to corresponding antenna by radio frequency transceiver and is emitted;The antenna is respectively arranged in left ventricle, left atrium, right ventricle, right atrium;Antenna receives reflected signal, and is recorded as heart sensing signal;Heart sensing signal is transmitted to radio frequency transceiver, and after processing, the baseband signal containing heart chamber beat information is obtained;The baseband signal containing heart chamber beat information is multiplied with corresponding synchronous chip to demodulate, band-pass filter, and the demodulation signal corresponding to heart chamber beat information is obtained respectively.

Provided in the present application are a biomagnetic signal-based four-dimensional cardiac function imaging method and device. The method comprises: acquiring a cardiac magnetic signal of a subject to be tested and dynamic structure information of a target torso part within a full cardiac cycle, wherein the target torso part at least comprises two lungs, a torso, and a heart chamber and a pericardium structure thereof, and the dynamic structure information comprises a contour structure and a plurality of frames of dynamic images; performing spatial registration on the dynamic structure information and a sensor acquiring the cardiac magnetic signal to obtain coordinates of the sensor in a coordinate system of the dynamic structure information; calculating and reconstructing a cardiac electrical excitation activity based on the dynamic structure information, the coordinates of the sensor, and the cardiac magnetic signal to obtain a calculation and reconstruction result; and converting the calculation and reconstruction result into a four-dimensional visualization image.

A medical system includes a device receptacle configured to hold an implantable medical device (IMD) (102) within a receptacle volume. The device receptacle is supported by a delivery catheter configured to position the device receptacle within an anatomical volume of a patient, such as a heart chamber. A device tether (120) including a conductive tether supports a tether head (128) configured to engage and / or disengage with the IMD. A tether electrode (129) is configured to receive an intrinsic electrical signal generated by a heart of the patient. The device tether is configured to use the conductive tether to conduct the intrinsic electrical signal from the tether electrode to processing circuitry outside of the patient's body.

An access device for a heart chamber, a removable hemostatic valve unit, and a system and a method of creating a transapical passage on a beating heart are disclosed. In examples, the access device (1) includes an apical base plate (100) and a sealing unit (3) configured to provide a separation of a wet zone from a heart chamber and a dry zone with a gaseous environment outside of said heart chamber inside a patient body at the same time.

A method includes receiving an anatomical mapping of the wall tissue of at least a portion of a heart chamber. During ablation, the positions of electrodes from a catheter within the heart chamber are received. At least some of the electrode positions are projected onto a surface of the mapping. The shortest path between pairs of projected positions of adjacent electrodes is found. When a path has a path length below a given threshold path length, some paths in the path are indicated using a first indication representing continuous ablation. Other paths in the path are indicated using a second indication representing an ablation gap based on catheter geometry. A grid ablation label is generated based on the first and second indications and an ablation model. The grid ablation label is overlaid on the anatomical mapping to generate an ablation mapping and is graphically encoded according to the first and second indications. The graphically encoded ablation mapping is presented to a user.

The application relates to a self-adaptive cardiac ultrasound blood flow imaging method and device. The method comprises the following steps: configuring to perform a plurality of times of cardiac ultrasound blood flow imaging operations, wherein each time of cardiac ultrasound blood flow imaging operation comprises sequentially performing a cardiac B mode imaging operation and a cardiac blood flow motion imaging operation; after the cardiac B mode imaging operation is performed, at least one frame of cardiac B mode ultrasound image is generated; based on an identified blood flow region of a heart chamber of interest, blood flow motion imaging emission sound field optimization is performed to generate blood flow motion imaging target emission parameters used when the cardiac blood flow motion imaging operation is performed; when the cardiac blood flow motion imaging operation is performed, blood flow echo signals are collected, and a frame of blood flow motion image is generated based on the collected blood flow echo signals. The application can improve the quality of cardiac ultrasound blood flow imaging and the accuracy of subsequent cardiac ultrasound blood flow imaging analysis, and widen the use range in the clinic.

The application discloses a kind of cardioplegic solution perfusion monitoring device and monitoring method, it is related to medical instrument technical field.The device includes cardioplegic solution perfusion pipeline, cardioplegic solution backflow pipeline, membrane oxygenator, first detection sensor and second detection sensor;The input end of cardioplegic solution perfusion pipeline is suitable for being introduced into cardioplegic solution, and the output end of cardioplegic solution perfusion pipeline is suitable for being inserted in heart;The input end of cardioplegic solution backflow pipeline is suitable for being communicated with heart chamber;The output end of cardioplegic solution backflow pipeline is communicated with membrane oxygenator;First detection sensor is arranged on cardioplegic solution perfusion pipeline, and first detection sensor is used to detect the composition of cardioplegic solution transported to heart;Second detection sensor is arranged on cardioplegic solution backflow pipeline, and second detection sensor is used to detect the composition of cardioplegic solution extracted backflow by heart chamber.The application provides a kind of cardioplegic solution perfusion monitoring device and monitoring method, realizes the monitoring of cardioplegic solution composition, is helpful to improve myocardial protection effect and reduce the risk of postoperative complication of heart.

The application provides a system for constructing a heart chamber measurement model and a storage medium, and the heart chamber precision measurement model comprises an image segmentation and three-dimensional reconstruction module, a spatial distance calculation module, a dynamic function parameter evaluation module and a calcification artifact compensation module. The application breaks through the limitation of low accuracy of traditional static straight-line measurement, and through the image segmentation and three-dimensional reconstruction technology driven by deep learning, the model can realize sub-millimeter level measurement accuracy, and construct an accurate three-dimensional model of the heart chamber. The application can assist in the size selection and path planning of interventional instruments, thereby effectively improving the efficiency and safety of structural heart disease surgery.