18 results about "Right atrium" patented technology

The present disclosure relates to a device assembly and a method for treating heart failure by normalizing elevated blood pressure in the left atrium of a heart of a mammal. Disclosed herein is a transcatheter interatrial septum excision device assembly configured to create a sized interatrial aperture between the right and left atria of a heart for the relief of elevated left atrial pressure. The device assembly comprises a delivery catheter, a tissue stabilizer attached to a first catheter having a central lumen and a penetrating tip that permits passage of a guidewire, and a cutter attached to a second catheter having a central lumen that permits passage of the first catheter. Alternative configurations comprise a (third) catheter having a central lumen that permits passage of the aforementioned components to and from the right atrium, a tissue retention mechanism and an optional coaxial alignment mechanism.

A method of sensing a physiological parameter involves advancing a delivery catheter to a right atrium of a heart of a patient via a transcatheter access path, advancing the delivery catheter through an atrial septal wall into a left atrium of the heart, deploying a distal anchor of a sensor implant device from the delivery catheter, anchoring the distal anchor of the sensor implant device to a first pulmonary vein, withdrawing the delivery catheter from the first pulmonary vein, thereby exposing at least a portion of a sensor module of the sensor implant device in the left atrium, deploying a proximal anchor of the sensor implant device from the delivery system, anchoring the proximal anchor of the sensor implant device to a second pulmonary vein, and withdrawing the delivery catheter from the heart.

This invention discloses a method for blood collection from the right adrenal vein, belonging to the field of venous blood collection methods. The method includes the following steps: providing an RH catheter, which is a dedicated catheter for hepatic artery angiography, with its tip bent 180° to form a plane, and its tip bent perpendicularly to this plane at 90°; inserting the RH catheter through the right femoral vein, advancing it to form a loop in the right atrium, and then pulling it back to the inferior vena cava; adjusting the direction of the RH catheter, using its three-dimensional curved portion to hook onto the opening of the right adrenal vein, thereby inserting it into the right adrenal vein; injecting contrast agent to confirm that the tip of the RH catheter is located within the right adrenal vein; collecting a blood sample from the right adrenal vein through the RH catheter, with a single blood sample volume of 12 ml; after blood collection, performing post-confirmation angiography to verify whether the RH catheter is located within the target vein. This invention can significantly improve the success rate of right-side catheter insertion and blood collection efficiency, while reducing costs and facilitating operation.

An apparatus, system, and method for creating a shunt between a right atrium and a left atrium of a patient's heart. An apparatus includes a shielding structure, a tube proximal to the shielding structure, and an actuating mechanism at a proximal end of the tube. The tube is configured to pass through a lumen of a steerable catheter. The actuating mechanism is for deploying the shielding structure through the tube. The shielding structure is configured for passing through an opening in an atrial septum from the right atrium to the left atrium, and for being retracted in a proximal direction to contact the atrial septum for shielding a proximity of the opening from blood flow in the left atrium to facilitate cryoablation of the opening from the right atrium.

The present technology is directed to adjustable interatrial shunting systems that selectively control blood flow between the left atrium and the right atrium of a patient. The adjustable interatrial devices include a shunting element having an outer surface configured to engage native tissue and an inner surface defining a lumen that enables blood to flow from the left atrium to the right atrium when the system is deployed across the septal wall. The systems can include an actuation assembly for selectively adjusting a geometry of the lumen and / or a geometry of a lumen orifice to control the flow of blood through the lumen.

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.

The engagement of the two atria via atrial pacing therapy is determined using one or more metrics based on monitored external electrical activity. For example, external electrical activity can be monitored during delivery of the atrial pacing therapy, right atrial and left atrial components can be generated based on the monitored external electrical activity, and one or more metrics can be generated based on the right atrial and left atrial components. One or more metrics can then be used to determine whether the atrial pacing therapy has biatrial engagement.

A method for forming a shunt between the right and left atria of a mammalian heart, the method comprising puncturing an atrial septum between the right and left atria to form the shunt. An ablation device having a balloon is at least partially advanced through the shunt. The balloon is inflated and configured to thermally insulate the atrial septum from the blood within the left and right atria. Ablation energy is delivered to ablate the atrial septum.

Systems and methods are described for modulating blood flow through a blood vessel by providing an implantable device implanted in the blood vessel, monitoring, pressure in the blood vessel, and in response to detecting when a first pressure in the blood vessel is above a first predefined pressure range, causing actuation of the implantable device to modulate the blood flow through the blood vessel or an adjacent blood vessel according to a first actuation cycle configured to maintain the first pressure within the first predefined pressure range. In addition, the systems and methods may, in response to detecting, when a second pressure is above a second predefined pressure threshold, cause switching of the implantable device to a second actuation cycle to alter the modulation of the blood flow through the blood vessel.

The disclosure notably relates to an apparatus for minimally invasive medical use, comprising an elongated part including a catheter and / or a catheter sheath, the elongated part having a distal portion and an intermediate portion, the elongated part being configured for being introduced inside the inferior vena cava of a human patient and positioned at an operating location where the distal portion is in and / or beyond the right atrium and the intermediate portion is in the inferior vena cava, and one or more monitoring electrodes arranged on the intermediate portion of the elongated part, the one or more monitoring electrodes being configured for monitoring an electrical activity of the diaphragm of the human patient when the elongated part is positioned at the operating location. This forms an improved solution for monitoring an electrical activity of the diaphragm of a human patient.

A catheter for delivering a medical electrical lead to a bundle of His from within a right atrium of a heart. The catheter includes a straight portion and a hook portion projecting from a distal end of the straight portion. The hook portion includes a first curved portion, a second curved portion, and a third curved portion. The straight portion and the first curved portion define a plane. The second curved portion extends from a distal end of the first curved portion. The second curved portion curves away from the plane. The third curved portion extends from a distal end of the second curved portion. The third curved portion curves toward the plane. The catheter forms a lumen extending from a proximal end of the straight portion to an opening at a distal end of the third curved portion.

The present invention relates to a device and method for segmenting the membranous septum. The method comprises segmenting the left ventricular outflow tract, LVOT, of the heart in a 3D image data set; determining wall thickness information indicative of the wall thickness of the septum at different locations of a part of the segmented LVOT that is oriented towards the right heart chambers and right atrium; mapping the determined wall thickness information onto the surface of said part of the segmented LVOT; and segmenting the membranous septum in the 3D image data set based on the mapped wall thickness information.

This invention discloses a systemic circulation venous simulation system, comprising a right ventricular simulation component, an arterial compliance simulation component, a venous vessel module, a damping module, a throttling valve, a collapsible venous segment, a venous compliance simulation component, a right atrial simulation component, a drive module, and a data acquisition module. The right ventricular simulation component simulates the pumping function of the right ventricle; the arterial compliance simulation component simulates the elastic energy storage characteristics of the arterial system; the venous vessel module includes a collecting chamber, a superior vena cava return vessel, an inferior vena cava return vessel, and a vena cava confluence conduit; the collapsible venous segment prevents excessive negative pressure in the venous system; the venous compliance simulation component reduces the impact of right atrial pressure fluctuations on the venous vessels; and the right atrial simulation component simulates the right atrial filling state through internal volume changes. This simulation system can be used for in vitro testing of vena cava intervention devices.

Systems and methods are described for modulating blood flow through a blood vessel by providing an implantable device implanted in the blood vessel, monitoring, pressure in the blood vessel, and in response to detecting when a first pressure in the blood vessel is above a first predefined pressure range, causing actuation of the implantable device to modulate the blood flow through the blood vessel or an adjacent blood vessel according to a first actuation cycle configured to maintain the first pressure within the first predefined pressure range. In addition, the systems and methods may, in response to detecting, when a second pressure is above a second predefined pressure threshold, cause switching of the implantable device to a second actuation cycle to alter the modulation of the blood flow through the blood vessel.

This invention discloses a method comprising locating a Koch triangle region in the right atrium of a patient's heart; securing at least one electrode of an implantable lead or device from the Koch triangle region to cardiac tissue for delivery of atrium-to-ventricle (VfA) cardiac therapy; and testing the position or depth of the at least one electrode to configure the VfA cardiac therapy. Locating the target implantation area in the Koch triangle region may include detecting atrial slow path potentials (ASP) or atrial pacing outputs.

A lightweight Mamba right atrial segmentation system based on Atlas prior and boundary awareness is presented, belonging to the field of medical image processing technology. This invention addresses the challenge of existing methods simultaneously achieving segmentation accuracy, lightweight models, and real-time performance. It utilizes a constructed right atrial probabilistic map (Atlas) to provide anatomical structure prior guidance for subsequent segmentation tasks, enhancing performance in LGE-MRI right atrial image segmentation. An attention-guided boundary enhancement module strengthens boundary feature representation at the feature level, while a dynamic weight scheduler optimizes boundary segmentation at the loss function level. This approach obtains complementary information from both region segmentation and boundary optimization, ensuring high image segmentation performance. Furthermore, the lightweight Mamba segmentation network significantly reduces the number of parameters and computational complexity while maintaining long-range dependency modeling capabilities, guaranteeing real-time segmentation. This method can be applied to right atrial image segmentation.