142 results about "Right atrium" patented technology

An asymmetric device for regulating blood volume distribution across a patient's atrial septum having a first expandable end region and a second expandable end region. The first expandable end region is transitionable from a contracted delivery state to an expanded deployed state in which the first expandable end region extends into the patient's left atrium and an inlet end of the first expandable end region is in a first plane. The second expandable end region is transitionable from a contracted delivery state to an expanded deployed state in which the second expandable end region extends into the patient's right atrium and an outlet end of the second expandable end region is in a second plane, such that the first plane intersects the second plane. The device further includes a neck region joining the first expandable end region to the second expandable end region, wherein the neck region is sized and shaped for placement in the patient's atrial septum.

A method is provided that includes inserting an inflow cannula of a left ventricular assist device (LVAD) of a LVAD system into a left chamber of a heart of a patient transeptally via a right atrium and a superior vena cava (SVC). An outflow cannula of the LVAD is coupled to a left subclavian artery or a left axillary artery. Other embodiments are also described.

Systems and methods for implanting a shunt for regulating blood pressure between a patient's left and right atria are provided. The shunt comprises an anchor having a neck region, first and second end regions, and a conduit affixed with the anchor formed of a biocompatible material that is resistant to transmural and translation tissue ingrowth and that reduces a risk of paradoxical embolism. The shunt may be advanced through the sheath until the first region protrudes from the sheath and self-expands within the left atrium. The shunt and the sheath may then be retracted until the first region contacts the left side of the atrial septum. The sheath may further be retracted until the counterforce exerted by shunt tension on the atrial septum overcomes the friction of the retained portions of the shunt such that the second region is exposed from the sheath and self-expands within the second atrium.

A method and apparatus for treatment of heart failure by increasing secretion of endogenous naturetic hormones ANP and BNP such as by stimulation of the heart atria. Heart pacing is done at an atrial contraction rate that is increased and can be higher than the ventricular contraction rate. Pacing may include mechanical distension of the right atrial appendage. An implantable device is used to periodically cyclically stretch the walls of the appendage with an implanted balloon.

A cardiovascular implant device includes an annular body, one or more anchoring members, and a flow directing component. The annular body includes a central flow tube extending from an inflow end to an outflow end and a flow path extending through the central flow tube. The one or more anchoring members extending outward from the annular body and are configured to secure the cardiovascular implant device to a tissue wall. The flow directing component is positioned to align a flow of blood out of the cardiovascular implant device with a natural flow pattern of blood in a right atrium so that the flow of blood out of the cardiovascular implant device joins with the natural flow pattern of blood in the right atrium.

The utility model provides a rapid non-exchange puncturing and conveying system for heart patent foramen ovale plugging. The rapid non-exchange puncturing and conveying system comprises a conveying sheath body and an expansion inner core. The conveying sheath body comprises a sheath head section, a bending adjusting section, a pipe body section and a connector section which are sequentially arranged. The total length of the sheath head section and the bending adjusting section is 2-3 cm, the length of the bending adjusting section is 0.5-1 cm, and the bending degree of the bending adjusting section is adjustable. The expansion inner core is arranged in the conveying sheath body in a penetrating mode. The conveying sheath body, the expansion core and the plugging device assembly system can smoothly complete the conveying sheath to enter the left atrium through the patent foramen ovale and complete the plugging device release operation, particularly, the bending adjusting section is designed to be adjustable in bending, the conveying sheath is more suitable for right atrium operation of different forms, the instrument exchange step in the existing operation process is reduced, and the operation efficiency is improved. The risk that an atrium and an atrial appendage are damaged by an existing material is reduced, the operation time can be remarkably shortened, and a very simple patent foramen ovale plugging operation is achieved.

Systems, devices and methods are provided for supporting cardiac function. A device comprises an elongate housing configured for implantation into a patient exterior to the chest cavity. The housing includes a first inlet and an outlet that define a primary blood flow path from the left atrium through at least a portion of the housing within the right atrium, and to the aorta. The housing comprises a motor disposed within the housing and an impeller coupled to the motor for pumping blood from the first inlet to the outlet of the housing through the primary blood flow path. The device bypasses the left ventricle by drawing freshly oxygenated blood from the left atrium and propelling this blood directly into the aorta. Implanting the pump exterior to the chest cavity is less invasive and allows the pump to be quickly and easily repaired, cleaned, repositioned and or replaced without removing or replacing the tubes that are anchored to sensitive tissue structures within the thoracic cavity.

The invention provides an automatic counting method and system for ultrasonic microbubbles in right heart acoustic radiography. The method comprises the following steps: acquiring a cardiac radiography image of a patient through high-resolution ultrasonic equipment; extracting a region of interest of the cardiac angiography image based on the cardiac vascular structure, and performing image registration operation on the cardiac angiography image by taking the region of interest as a reference point to obtain a registered image; carrying out pixel-by-pixel addition on two frames of pulse images with opposite phases in the registered image to obtain an enhanced image; determining the high-echo bright spots in the enhanced image as suspected microbubbles, and performing denoising processing according to the feature similarity to obtain real microbubbles; judging pathological conditions according to whether real microbubbles exist in the left atrium or not; if the real microbubbles exist in the left atrium, grading the abnormal blood flow according to the change data of the microbubbles in the left atrium and the right atrium. According to the method, through high-precision image registration, multi-modal feature analysis and dynamic parameter fusion technologies, the microbubble detection accuracy is improved, and quantitative grading of pathological conditions is achieved.

A device for regulating blood pressure between a patient's left atrium and right atrium comprises an hourglass-shaped stent comprising a neck region and first and second flared end regions, the neck region disposed between the first and second end regions and configured to engage the fossa ovalis of the patient's atrial septum, and a drug-eluting biodegradable material that biodegrades over time to release a drug that limits tissue overgrowth. The inventive device also may include a biodegradable material that biodegrades to offset flow changes caused by tissue overgrowth. The inventive device may reduce left atrial pressure and left ventricular end diastolic pressure, and may increase cardiac output, increase ejection fraction, relieve pulmonary congestion, and lower pulmonary artery pressure, among other benefits.

A device for regulating blood pressure between a patient's left atrium and right atrium comprises an hourglass-shaped stent comprising a neck region and first and second flared end regions, the neck region disposed between the first and second end regions and configured to engage the fossa ovalis of the patient's atrial septum; and a one-way tissue valve coupled to the first flared end region and configured to shunt blood from the left atrium to the right atrium when blood pressure in the left atrium exceeds blood pressure in the right atrium. The inventive devices may reduce left atrial pressure and left ventricular end diastolic pressure, and may increase cardiac output, increase ejection fraction, relieve pulmonary congestion, and lower pulmonary artery pressure, among other benefits. The inventive devices may be used, for example, to treat subjects having heart failure, pulmonary congestion, or myocardial infarction, among other pathologies.

A method and system for performing transseptal extracorporeal membrane oxygenation is disclosed. The method may include puncturing a septum between the right atrium and the left atrium and advancing a catheter system through the puncture and into the aorta. A first portion of the catheter system can remove blood from the patient, in some examples near the inferior vena cava. A second portion can return oxygenated blood to the patient, through the transseptal puncture and into the aorta.

An implantable lead for use with an implantable medical device (IMD) includes a tubular lead body having a proximal portion including a proximal end, a distal portion including a distal end opposite the proximal end, and an intermediate portion between the proximal portion and the distal portion. A helical electrode extends distally from the distal end of the tubular lead body. At least one atrial electrode is disposed in the intermediate portion of the tubular lead body. At least one electrical conductor extends through the tubular lead body and is mechanically and electrically coupled to the helical electrode and the at least one atrial electrode. The intermediate portion may have a pre-formed bend configured to urge the at least one atrial electrode against a surface of the right atrium when the lead is implanted. A distal pre-formed bend located in the distal portion of the tubular lead body may be configured to bias a plurality of pacing / sensing electrodes towards a surface of a right ventricle. A distal pre-formed bend located in the distal portion of the tubular lead body may be configured to bias the helical electrode and at least one pacing / sensing against a surface of a right ventricle.

The invention relates to the technical field of image processing, in particular to an ultrasonic image processing method and device, equipment and a storage medium, and the method comprises the steps: obtaining an ultrasonic heart video at a current detection position, and determining the section type of an image frame in the ultrasonic heart video; if a target image frame of which the section type is a right atrium detection section exists in the ultrasonic heart video, performing right atrium recognition on the target image frame to obtain a right atrium image; based on the size of the right atrium area in the right atrium image, determining a target right atrium image in the right atrium image; and performing target parameter measurement on the right atrium based on the target right atrium image, and determining target parameters of the right atrium. Therefore, automatic selection of the target right atrium image is realized, the recognition accuracy and efficiency of the target right atrium image are improved, automatic measurement of the target parameter of the right atrium is realized, the operation is simplified, and the accuracy is high.

The utility model relates to an adult simulation load device for online calibration of an extracorporeal membrane oxygenation system. The system comprises a left ventricular artery system simulation box, a right atrial vein system simulation box, a resistance device, a V-A ECMO treatment mode artery perfusion cannula, a V-V ECMO treatment mode vein perfusion cannula, a vein drainage cannula, a bottom plate, a right atrial vein system simulation box hydraulic monitoring sensor, a left ventricular artery system simulation box hydraulic monitoring sensor and a manual pressure release valve. And a ball valve pressurizing device and a vertical partition plate. The left ventricular artery system simulation box, the resistance device and the right atrial vein system simulation box are sequentially connected through pipelines. The device is simple in structure, convenient and practical to operate and capable of accurately simulating the blood volume of a patient, the pressure difference between a venous system and an arterial system and the resistance of a blood circulation system when an adult patient adopts a V-A ECMO treatment mode and a V-V ECMO treatment mode respectively, and has practical value; calibration data has clinical guiding significance, the measurement accuracy of key parameters of equipment is effectively guaranteed, and clinical risks are reduced.

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.

An arrhythmia type inference device includes: an obtaining section that obtains a target signal waveform indicating a time-series change in the area of a region, which is at least one of a left atrium, a left ventricle, a right atrium, and a right ventricle, the target signal waveform being generated by analyzing an image of a heart of a target subject; and an inference section that infers the type of tachyarrhythmia suffered by the target subject based on the shape of the target signal waveform having a frequency in a frequency band higher than a reference frequency band predetermined as a normal range. This allows the arrhythmia type inference device to accurately infer the type of tachyarrhythmia from the image obtained by image-capturing of the heart.

The invention discloses a hemodynamic monitoring system and a control method for an intermittent occlusion balloon catheter. The monitoring system comprises a blood flow pressure measurement module, a cardiac displacement measurement module, a thrombus monitoring module and an infusion pump control module. The control method comprises the steps that a right atrium and vena cava pressure threshold value is set, the size of a balloon is controlled and adjusted through an infusion pump, the relation between blood flow pressure and the pressure threshold value is continuously monitored, and then the expansion size and time of the balloon are fed back and adjusted; based on an automatic cold solution suction-discharge module, the cardiac displacement change is indirectly measured; in the treatment process, parameter changes such as cardiac displacement, right atrium pressure and vena cava pressure of a patient are measured, and whether the patient recovers hemodynamics or not is monitored, and safe machine withdrawal conditions are met; and the thrombus risk condition near the balloon is analyzed through the thrombus monitoring module. The size and time of the balloon are adjusted through pressure feedback, and the infusion precision is improved; and machine withdrawal judgment conditions are set, so that the treatment effect of the patient is improved.

The present technology is generally directed to interatrial shunting systems and associated devices and methods. For example, a system configured in accordance with embodiments of the present technology can include a shunting element implantable into a patient at or adjacent a septal wall. The shunting element can have a lumen that fluidly connects a left atrium and a right atrium of the patient to facilitate blood flow therebetween when the shunting element is implanted. In some embodiments, the system further includes a flow control element to selectively control blood flow between the left atrium and the right atrium.

The present invention relates to an equal-dose opposed-vessel monitoring pulmonary artery-pulmonary vein CT angiography method and system. For the method, the dose of the contrast agent bolus test, the flow rate and volume of the contrast agent, and the flow rate and volume of the normal saline are all consistent with those in the formal scan; during the bolus test, it is confirmed that a small amount of contrast agent flows into the pulmonary vein of the monitored slice while the pulmonary artery is filled, so as to obtain the optimal delay time of pulmonary artery CTA; it is confirmed that almost all of the contrast agent in the monitored slice has flowed through the pulmonary artery, and there is a trace amount of contrast agent at the end of the pulmonary artery near the periphery, so as to obtain the optimal delay time of pulmonary vein CTV. The system includes each module for realizing the above functions. The present invention can achieve accurate timing of pulmonary artery CTA and pulmonary vein left atrial CTV scans, and can also achieve accurate timing of combined one-stop right atrium ventricle pulmonary artery and pulmonary vein left atrium ventricle combined scans, realizing precise diagnosis and treatment.

A method of right atrial pacing of a heart of a patient includes the steps of: stimulating right atrial tissue of the heart using a right atrial lead of a dual chamber cardiac pacemaker to pace the heart with a stimulus architecture protocol; and stimulating local sympathetic and / or parasympathetic tissues with the stimulus architecture protocol proximate to the paced right atrial tissue causing nervous system activity that inhibits the autonomous nervous system to reduce blood pressure. A closed loop system operating according to this method and a cardiac pacing lead for implementing this method also are included within the scope of the illustrated embodiments.

An ultrasound imaging and backscatter system includes an ICE ultrasound catheter having an ultrasound pMUT transducer array disposed within a distal end of the ultrasound catheter and including a plurality of transducer array elements disposed on a substrate. One end of the catheter shaft is connected to the handle assembly and the other end is connected to the ultrasonic transducer array. The catheter shaft accommodates an electronic flexible cable in communication with the signal trace and directs each of the plurality of transducer array elements to transmit and receive an ultrasound beam, receives at least one signal from the plurality of transducer array elements, and constructs at least one image characterizing one or more tissue components of the scanned object. An ultrasound imaging system is used to measure tissue thickness, tissue scar, and lesion assessment for left atrium, right atrium, left ventricle, and right ventricle tissue wall characteristics and other intracardiac tissue anomalies.

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.

The present disclosure relates to a method and a device for treating heart failure by normalizing elevated blood pressure in the left and right atria of a heart of a mammal. The present disclosure includes methods for creating and maintaining an opening in the atrial septum. Tools for making an opening and enlarging the opening are also disclosed. Use of the techniques and tools described herein prolongs the patency of an intra-atrial pressure relief opening.

A method and devices for relieving pressure in the left atrium of a patient's heart is disclosed. The method includes using an ablative catheter in a minimally invasive procedure to prepare an opening from the coronary sinus into a left atrium of the patient's heart. Once the opening is prepared, the opening may be enlarged by a technique such as expanding a balloon within the opening. A stent is then placed within the coronary sinus of the patient, with a transverse portion expanding within the opening, allowing blood to flow from the left atrium to the coronary sinus and then to the right atrium. Pressure within the left atrium is thus relieved.

The invention discloses an atrium modeling method based on nnUnet, and belongs to the field of digital medical treatment. The method comprises the following steps: firstly, obtaining a trained nnUnnet-v2 deep learning network, and obtaining adventitia areas of a left atrium and a right atrium of atrial LGE-MRI image data to be subjected to atrial modeling based on the trained nnUnnet-v2 deep learning network; then myocardial areas of the left atrium and the right atrium and blood pool areas of the left atrium and the right atrium are obtained, the strength of all myocardial signal mark points of the left atrium and the right atrium and the strength of all blood pool signal mark points of the left atrium and the right atrium are obtained, and finally fibrosis areas of the left atrium and the right atrium are obtained and subjected to fibrosis labeling. Then linear interpolation is carried out on the basis of the myocardial areas of the left atrium and the right atrium subjected to fibrosis labeling, and a primary atrium three-dimensional model is obtained; and repairing and optimizing the primary atrium three-dimensional model to obtain the atrium three-dimensional model. The method can be widely applied to the fields of atrial disease research, treatment planning and related medical image analysis.

A right cardiac assisting device to be percutaneously implanted inside a patient's heart, including an inlet, an outlet, a pump connecting the inlet to the outlet, and being designed to be located inside the right atrium or vena cava of the patient. The assisting device includes at least one support element configured to be secured to a first membrane of the patient's heart by passing through the first membrane, the first membrane separating the right atrium from the pulmonary artery of the patient's by passing through it. The support element tightly cooperates with the outlet to immobilize the pump, the inlet and the outlet inside the patient's heart and enable the patient's blood flow to be driven from the inlet to the outlet through the first membrane.

Apparatuses and methods for performing transseptal extracorporeal membrane oxygenation are disclosed. The method may include puncturing a septum between the right atrium and the left atrium and advancing a catheter system through the puncture and into the aorta. The catheter system may include coaxially arranged and independently moveable venous and arterial sheaths having independently positionable openings for removing blood from the patient and for returning oxygenated blood to the patient, e.g., within the aorta.

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 invention relates to the technical field of internal medicine operations, and discloses an ectopic implantation valve stent system for treating tricuspid regurgitation, which comprises a right atrium and a right ventricle fixedly connected to the right atrium; the tricuspid valve is fixedly connected between the right atrium and the right ventricle; the cannula assembly is connected into the tricuspid valve in a sliding mode; the supporting assembly is fixedly connected to the right atrium; the bracket assembly is fixedly connected to the supporting assembly; the valve assembly is fixedly connected to the supporting assembly; one part of the supporting assembly is fixedly connected to the right atrium, and the other part of the supporting assembly is fixedly connected to the tricuspid valve. Liquid medicine is injected into the curing tube through the sealing nozzle through the injection tube, after the liquid medicine and the curing liquid are mixed, the curing liquid is cured, meanwhile, barbed nails on the fixing plate layer are used for puncturing the root of the tricuspid valve for further fixing, the stent assembly and the valve assembly are not prone to falling off after being installed, the service time is longer, and the fixing effect is better. Patients do not need to have mental stress due to the falling risk of the support assembly.

Mitral regurgitation can be reduced by creating one passageway between the right atrium and left ventricle in a portion of the tricuspid annulus just above the ventricular septum and another passageway through the outer wall of the left ventricle near at least one of the left ventricular papillary muscles. A support rod is positioned in the right atrium in contact with the septal portion of the tricuspid annulus, and a support plate is positioned adjacent to the second passageway and against the outer wall of the left ventricle. The support plate is pulled toward the support rod using a tether that extends between the first support plate and the support rod, passes through both passageways, and is under tension. The tension in the tether moves the root of the tendon closer to the mitral valve, which reduces mitral regurgitation.