34 results about "Ventricular outflow tract" patented technology

A valve replacement system that can be used for treating abnormalities of the right ventricular outflow tract in a nonsymmetrical region of a vessel or conduit that includes a prosthetic valve device and a foundation structure. The foundation structure contacts a portion of the inner wall of a vessel or conduit, and undergoes a shape change resulting in a corresponding change in the wall of the vessel or conduit. As a result, the lumen of the conduit is made symmetrical, and is complementary to the exterior surface of the stented valve, and thereby, improves the functioning of the valve. Another embodiment of the invention includes a method for replacing a pulmonary valve that includes forming a symmetrical region in a lumen of a conduit and placing a stented valve in the symmetrical region.

A system for treating abnormalities of the right ventricular outflow tract includes a prosthetic valve device having a barrier material contacting at least a portion of the outer surface of the valve device. One embodiment of the invention includes a barrier member attached to the exterior surface of the valve device. Another embodiment includes a barrier material that is injected within the vascular system. Yet another embodiment of the invention includes a method for replacing a pulmonary valve that includes forming a barrier around the outer surface of a replacement valve and preventing blood flow around the replacement valve.

A system for treating abnormalities of the right ventricular outflow tract includes a prosthetic valve device having a barrier material contacting at least a portion of the outer surface of the valve device. One embodiment of the invention includes a barrier member attached to the exterior surface of the valve device. Another embodiment includes a barrier material that is injected within the vascular system. Yet another embodiment of the invention includes a method for replacing a pulmonary valve that includes forming a barrier around the outer surface of a replacement valve and preventing blood flow around the replacement valve.

A double walled stent system particularly suited for treating abnormalities of the right ventricular outflow tract is disclosed having an exterior stent component and an interior stent component. The exterior stent component is secured to the interior stent component in a non-fixed, sliding relationship. The exterior stent component includes a plurality of longitudinally-extending connectors such as straight or sinusoidal bands. The interior stent component has a generally tubular cylindrical body and is centered within the exterior stent component. The stent system has a contracted delivery configuration and a radially expanded configuration for contacting the vessel wall. When deployed, the longitudinally-extending connectors of the exterior stent component come in contact with the vessel wall and fix the stent system to the treatment site. The interior stent component also radially expands but remains centered inside the exterior component and makes little to no contact with the vessel wall.

A double walled stent system particularly suited for treating abnormalities of the right ventricular outflow tract is disclosed having an exterior stent component and an interior stent component. The exterior stent component is secured to the interior stent component in a non-fixed, sliding relationship. The exterior stent component includes a plurality of longitudinally-extending connectors such as straight or sinusoidal bands. The interior stent component has a generally tubular cylindrical body and is centered within the exterior stent component. The stent system has a contracted delivery configuration and a radially expanded configuration for contacting the vessel wall. When deployed, the longitudinally-extending connectors of the exterior stent component come in contact with the vessel wall and fix the stent system to the treatment site. The interior stent component also radially expands but remains centered inside the exterior component and makes little to no contact with the vessel wall.

A double walled stent system particularly suited for treating abnormalities of the right ventricular outflow tract is disclosed having an exterior stent component and an interior stent component. The exterior stent component includes a plurality of longitudinally-extending connectors such as straight or sinusoidal bands. The interior stent component has a generally tubular cylindrical body and is centered within the exterior stent component. The stent system has a contracted delivery configuration and a radially expanded configuration for contacting the vessel wall. When deployed, the longitudinally-extending connectors of the exterior stent component come in contact with the vessel wall and fix the stent system to the treatment site. The interior stent component also radially expands but remains centered inside the exterior component and makes little to no contact with the vessel wall.

A vascular valve constructed from a biocompatible material that is designed to be surgically implanted in a patient's blood vessel, such as the right ventricular outflow tract. At the first end of the valve there is an orifice defined by at least two opposing free edges, and which can occupy either a first, closed position or a second, open position. At the second end of the valve there are at least two flexible members attachable to an anterior and a posterior wall of a patient's blood vessel. A length of the orifice between said at least two opposing free edges when the orifice is generally closed is equal to about 1.5 to 2 times the diameter of a patient's blood vessel. Optionally, the two flexible members to a stent or tubular graft. The valved stent or tubular graft can be inserted into a patient's blood vessel or heart.

An apparatus for mapping and / or ablating tissue includes a braided conductive member that that may be inverted to provide a ring-shaped surface. When a distal tip of the braided conductive member is retracted within the braided conductive member, the lack of a protrusion allows the ring-shaped surface to contact a tissue wall such as a cardiac wall. In an alternative configuration, the braided conductive member may be configured with the distal portion forming a proboscis that can be used to stably position the braided conductive member relative to a blood vessel, such as a ventricular outflow tract. The braided conductive member has a plurality of electronically active sites that may be accessed individually for stable mapping over a broad area for stable mapping or ablation to form broad and deep lesions.

A method for treatment of congestive heart failure from the right side of the heart, by stimulating at numerous points along the right-ventricular septum to produce a fused line of stimulation upon breakthrough of wave fronts into the left ventricular septum and an LV action potential that simultaneously propagates toward the apex, base, and left free wall. Five electrodes, all in contact with the septum and spaced approximately 1.5 cm apart, produce a fused action potential in an average adult human within 10 ms of delivering simultaneous pacing pulses. Breakthrough of this fused region of stimulation will occur within 20 ms of delivering the pacing pulses. The most proximal electrode may be located in or near the right-ventricular apex. The most distal electrode may be located somewhere near the right-ventricular outflow tract, generally somewhere near the moderator band.

A heart valve constructed from a synthetic resin that is designed to be surgically implanted in the right ventricular outflow tract of the heart, comprising a plurality of flexible members, and an orifice.

The present invention is a high resolution, multi-function, conformal electronics device generally having a flexible and stretchable, high-density electrode array, integrated with a catheter (e.g., balloon catheter) for mapping, ablating, pacing and sensing of cardia tissue associated with heart arrhythmias. The active sensing electrode array can acquire diagnostic information including electrical (e.g., electrograms), mechanical (e.g., strain measurements), impedance (e.g., resistance), metabolic (e.g., pH or NADH measurement) from the underlying heart tissue surface with which it is in contact. The electrode array may be designed to be of various sizes and shapes to conform to the targeted cardiac tissue architecture (e.g. atrial, ventricle, right ventricular outflow tract, coronary sinus, pulmonary veins, etc.) corresponding to the specific type of cardiac arrhythmia. The present invention can precisely locate the source of arrhythmia as described above and deliver therapy from the same electrode array. This is achieved using a capacitive sensing electrode array that can not only monitor but also deliver electrical stimulation.

The invention relates to a pulmonary valve stent with an anchor mechanism, which comprises a valve suture section (1) and an artificial valve (2), wherein the artificial valve (2) is connected with the valve suture section (1), and the valve suture section (1) is positioned at a right ventricular outflow tract or a main pulmonary artery (10) after being released. The pulmonary valve stent further comprises the anchor mechanism (3), wherein the near end of the anchor mechanism (3) is connected with the far end of the valve suture section (1) by a transition connecting rod (4), and the anchor mechanism (3) is positioned in a pulmonary artery branching vessel (30) after being released. According to the pulmonary valve stent, as the anchor mechanism is placed in the pulmonary artery branching vessel and connected with the valve suture section positioned at the right ventricular outflow tract or the main pulmonary artery by the transition connecting rod, the stability of the valve stent can be improved significantly, and displacement of the pulmonary valve stent is avoided.

The invention relates to a novel artificial heart valve which is implanted to replace a de-functionalized heart valve by surgical operation or vascular intervention. The novel artificial heart valve comprises a stent and a valve leaflet. The valve leaflet is made of a porcine or bovine pericardium or made of artificially synthesized high polymer material. The stent is composed of an inflow segment and an outflow segment and dilates by the aid of a balloon or by self-expanding. The inflow segment is provided with a self-expanding ring. Soft braided fabric is wrapped around a nitinol wire to form a soft surface. The valve leaflet is attached to the outflow segment to form a valve leaflet segment integrated with the outflow segment. The left-expanding ring has diameter larger than that of the valve leaflet segment and radial holding power larger than that of the valve leaflet segment. The inflow segment is flexibly connected with the valve leaflet segment. The metallic stent of the novel artificial heart valve need not enter a left ventricular outflow tract, and a left ventricle is internally fixed through the self-expanding ring. In addition, the self-expanding ring has smaller supporting power than the valve leaflet segment and the soft surface, so that stress of an endocardium of a left ventricular outflow tract can be lowered evidently, and risks caused by conduction block are reduced.

The invention discloses an intrusive replacement valve which comprises a support, a sealing membrane and a valve leaf. The support is of a grid structure and in the shape of a waist drum, two ends of the support are large while the middle of the same is small, and three connecting lugs are arranged at one end of the support. The support is highly matched with a right ventricular outflow tract and a main pulmonary artery blood vessel respectively, thereby being less prone to displacement after release, and the sealing membrane is sewn around the inner side of the support , and the valve leaf is sewn on a grid in the middle of the support. The invention further provides a controllable conveying device. A connecting claw connected with the valve and an outer pipe containing the same are arranged at the front end of the controllable conveying device, and the connecting claw and the outer pipe mount the valve in the conveying device and realize a function of recovering part of the valve in the process of releasing through a control handle of the controllable conveying device. The control handle can realize rotating release and pushing release of the valve and can switch between rotating release and pushing release, so that operating difficulty is lowered, and operating success rate is increased.

Described is a delivery system for minimally invasive delivery of a self-expandable stent to a body lumen, and particularly delivery of a prosthetic valve to the right ventricular outflow tract. Also described is a method of loading a stent onto such a delivery system, and a method of delivering a self-expandable stent to a desired anatomic site.

The invention relates to a method for preparing a teaching specimen of a left ventricular outflow tract view of a fetus suffered from a congenital heart disease. In the method, a free heart specimen is prepared after a selected artificially-labored fetus having a malformed heart is antiseptically treated; and in the left ventricular outflow tract view, the horizontal axis of the view is parallel to the long axis of the heart by taking a pulmonary conus as a start point of a cross section, the cross section is up to a superior vena cava through aorta ascendens and down to the apex of the heart through an anterior interventricular groove. The obtained apical four-chamber view specimen has the advantages of integrated and complete structures of all parts, no damage to microstructures in the heart, the same shape as that in a real living body, and capability of meeting the requirements of medical teaching and practice and the like, and is suitable for schools, hospitals or medical research institutes.

The invention discloses a right ventricular outflow tract mapping and angiographic catheter and a preparation method of the angiographic catheter, and aims to solve the technical problem that an exact position of a target cannot be accurately positioned in the prior art. The right ventricular outflow tract mapping catheter disclosed by the invention is provided with a catheter. The end part of the far end of the catheter is provided with a mapping section. The mapping section is an open O-shaped ring in a free state. An end electrode is arranged at the end part of the mapping section. A ring electrode is arranged on the surface of the mapping section. The near end of the catheter is connected with a connector. The connector is electrically connected with the ring electrode and the end electrode by wires. The preparation method disclosed by the invention comprises the following steps: making parts; and assembling the parts. Compared with the prior art, the end part of the far end of the mapping catheter is provided with the mapping section which is of an O-shaped structure; the mapping section has elasticity and can be strengthened, so that the right ventricular outflow tract mapping and angiographic catheter is convenient to rapidly feed and the operating time is shortened; the mapping section is of an O-shaped structure in the free state; and the ring electrode on the mapping section which is of an O-shaped structure can define the position of the target and the ablation energy in the ablation process by mapping the right ventricular outflow tract, so that the right ventricular outflow tract mapping and angiographic catheter is safer and more effectively and is convenient to operate in the complete operating process.

The invention relates to a heart valve. The heart valve comprises a stent; the stent comprises a valve leaflet stent and a skirt edge stent; the valve leaflet stent and the skirt edge stent are prepared through one time moulding; the valve leaflet stent is provided with a first end and a second end opposite to the first end; the skirt edge stent is designed to stretch outward along the radial direction of the valve leaflet stent; the end of the skirt edge stent close to one end of the valve leaflet stent, and the first end are arranged at an interval, and the distance from the end of the skirtedge stent to the first end is 1 / 2 to 1 / 4 of the radial direction length of the valve leaflet stent. The heart valve is capable of avoiding ventricular outflow tract stenosis caused by implantation.

The invention belongs to the field of 3D printing and discloses a 3D model construction method for an aortic valve disease. The 3D model construction method comprises the following steps: step 1: acquiring and preprocessing aorta radiography data of an aortic valve disease patient to obtain heart CT data; step 2: establishing a calcified tissue model and a blood model according to gray values corresponding to different tissue in the heart CT data; step 3: comparing a valve leaflet border with an actual valve leaflet border and correction border in the heart CT data to obtain an inner cavity model; and step 4: deleting blood and reserving an aortic root, a partial coronary artery and a left ventricle outflow tract to obtain a 3D model for the aortic valve disease. The invention also discloses a 3D model preparation method for the aortic valve disease. The model construction efficiency is high, all that is required is to reconstruct the blood form in a blood vessel cavity and then rapidly segmented required tissue, whole reconstruction of blood vessel walls and other hearts and then segmentation are not needed, and a lot of time is saved for model repair.

The invention relates to the field of medical devices, in particular to a bending-adjustable puncture system and puncture method of pulmonary artery atresia of the newborn. The puncture system comprises an outer shell and a puncture needle, the outer shell is arranged outside the puncture needle in a sleeving mode, both the outer shell and the puncture needle can be flexibly bent, and at least the middle portions of the outer shell and the puncture needle are flexible. The puncture method comprises the steps that bending adjustment is conducted on the puncture system, so that the bending angle of the puncture system is matched with a right ventricular outflow tract-main pulmonary artery; then the puncture is conducted to enable the right ventricle to be connected with the pulmonary artery. The puncture system can be bent to an appropriate angle to complete the puncture based on angles of the right ventricular outflow tract-main pulmonary arteries of different child patients, and serious complications such as cardiac perforation, cardiac tamponade and the like are avoided, so that the successful rate of surgeries is ensured.

An implantable pump is configured to be implanted in series with blood flow from a heart. The pump includes a frame configured to be implanted within the natural blood flow of the heart such as a ventricular outflow tract an outlet valve of the heart, and a central axle configured to be affixed within the frame parallel to the blood flow. The pump also includes a rotor attached to the central axle and configured to rotate in order to pump blood, and at least two electromagnetic coils configured to be energized in order to cause the rotor to rotate.

A two component system for replacing mitral valves using a transcatheter approach. The first component uses a torus balloon to activate barbs into the mitral annulus after the first component stent frame has been delivered. A closed ring in the first component provides a landing site for delivery of a second component that contains replacement leaflets. The second component straddles the mitral annulus such that impingement upon the left ventricular outflow track does not occur. The second component frame contains open regions that help to prevent blood stagnation.

The invention provides an integrated surgical mitral valve replacement system which is characterized in that the integrated surgical mitral valve replacement system comprises an outer layer support and at least two surgical mitral valves arranged in the outer layer support; the outer layer support is a saddle-shaped structure support with a D-shaped section, and the edge of the outer layer support is coated with a soft material layer; and each surgical mitral valve comprises a valve seat, a valve frame and at least three biological tissue valve leaflets attached to the valve frame, and the valve seat, the valve leaflets and the valve frame are connected through a fabric layer wrapping the valve frame. According to the integrated surgical mitral valve replacement system, the ventricular outflow tract can be prevented from being blocked, meanwhile, the risk of winding with chordae tendineae is reduced, opening and closing are not interfered by factors except for blood flow, the requirements of the human body can be met, and a better treatment effect can be achieved on the whole.

An expandable valved catheter for pediatric right ventricular outflow tract (RVOT) reconstruction is disclosed. Valved catheters can provide long-term patency and resistance to thrombus and stenosis. The valved catheter can expand radially and / or longitudinally to accommodate the growing anatomy of the patient. Further, methods are disclosed for the production of valvated catheters based in part on plastically deformable biocompatible polymers, as well as computer-optimized valve designs developed for such expandable valvated catheters.

The invention discloses a dredger for a ventricular outflow tract. The dredger is mainly divided into a guiding area, an expanding area, a working area and an operating control area, wherein the guiding area is a steerable rod provided with a metal probe; the expanding area is of a conical structural shape, one end of the expanding area is connected with the guiding area, and the other end of the expanding area is connected with the working area; the working area is the working platform of the dredger for the ventricular outflow tract, and a rotary cutter and a longitudinal cutter are arranged in the working area; the rotary cutter is closely attached to the inner side of the pipe wall of the working area; the operating control area is provided with a rotary cutter operating device, and the rotary cutter operating device is in rigid connection with the rotary cutter and controls the rotary cutter to be folded or unfolded. The dredger can be conveniently, quickly, easily and safely used for probing and dredging the ventricular outflow tract. Therefore, dredging of the narrow ventricular outflow tract can be easily completed.

The invention relates to a novel artificial heart valve which is implanted to replace a de-functionalized heart valve by surgical operation or vascular intervention. The novel artificial heart valve comprises a stent and a valve leaflet. The valve leaflet is made of a porcine or bovine pericardium or made of artificially synthesized high polymer material. The stent is composed of an inflow segment and an outflow segment and dilates by the aid of a balloon or by self-expanding. The inflow segment is provided with a self-expanding ring. Soft braided fabric is wrapped around a nitinol wire to form a soft surface. The valve leaflet is attached to the outflow segment to form a valve leaflet segment integrated with the outflow segment. The left-expanding ring has diameter larger than that of the valve leaflet segment and radial holding power larger than that of the valve leaflet segment. The inflow segment is flexibly connected with the valve leaflet segment. The metallic stent of the novel artificial heart valve need not enter a left ventricular outflow tract, and a left ventricle is internally fixed through the self-expanding ring. In addition, the self-expanding ring has smaller supporting power than the valve leaflet segment and the soft surface, so that stress of an endocardium of a left ventricular outflow tract can be lowered evidently, and risks caused by conduction block are reduced.

An expandable valved conduit for pediatric right ventricular outflow tract (RVOT) reconstruction is disclosed. The valved conduit may provide long-term patency and resistance to thrombosis and stenosis. The valved conduit may enlarge radially and / or longitudinally to accommodate the growing anatomy of the patient. Further, a method is disclosed for the manufacture of the valved conduit based in part on a plastically deformable biocompatible polymer and a computer-optimized valve design developed for such an expandable valved conduit.

The invention provides a single-flap tube and a manufacturing method thereof. The single-flap tube comprises a tubular body and a flap; the upper edge of the flap is separated from the tubular body, and the side edge of the flap and the tubular body are sewed together, so that a flap bag is formed between the flap and the tubular body; at least one to-be-sewed layer is arranged on the tubular body; after being dismantled and sewed, the tubular body turns into a flake body; the inner diameter of the tubular body is determined by the length of the bottom edge of the flake body and the sewing consumption amount corresponding to the at least one to-be-sewed layer. The single-flap tube can be cut into the band flap bag patch of the required size, the band flap bag patch is sewed with the narrowright ventricular outflow tract and the pulmonary artery, and when the tube is widened and restored to a pulmonary artery tube with the standard inner diameter, partial backflow blood during diastolecan flow back into the flap bag. Therefore, when the heart is in the diastole state, the amount of blood flowing back to the ventriculus dexter from the pulmonary artery is reduced.

The invention relates to a pulmonary valve stent with an anchor mechanism, which comprises a valve suture section (1) and an artificial valve (2), wherein the artificial valve (2) is connected with the valve suture section (1), and the valve suture section (1) is positioned at a right ventricular outflow tract or a main pulmonary artery (10) after being released. The pulmonary valve stent further comprises the anchor mechanism (3), wherein the near end of the anchor mechanism (3) is connected with the far end of the valve suture section (1) by a transition connecting rod (4), and the anchor mechanism (3) is positioned in a pulmonary artery branching vessel (30) after being released. According to the pulmonary valve stent, as the anchor mechanism is placed in the pulmonary artery branching vessel and connected with the valve suture section positioned at the right ventricular outflow tract or the main pulmonary artery by the transition connecting rod, the stability of the valve stent can be improved significantly, and displacement of the pulmonary valve stent is avoided.