16 results about "Cardiac wall" patented technology

A cardiac electrode assembly. The inventive electrode assembly includes an active fixation device, such as a helical electrode configured to screw into the myocardium or a vessel wall. The invention also includes an array of two or more reversed tines. The reverse tines bear against the heart wall or vessel wall and inhibit unwanted distal motion of the electrode assembly. Various deployment devices that aid in the installation of the inventive electrode assembly are also described.

A method of estimating a value associated with heart wall tension. The method comprises: using motion data recorded with a sensor in communication with the heart to identify motion in the heart; and estimating a value associated with heart wall tension based on the identified motion in the heart. The motion in the heart that forms the basis of the estimation may be a vibration in the heart wall. A heat monitoring system for carrying out the method of estimating a value associated with heart wall tension comprises a sensor configured to be placed in communication with the heart in order to identify motion in the heart; and a data processing device arranged to receive motion data from the sensor and to then carry out the steps of the method.

A system may display a graphic of a heart that provides an indication of a target zone and an avoidance zone for implantation of the lead. The system may identify a location of the lead based on the location electrocardiogram, display on the graphic an indication of identified location; and determine whether the identified location is at an appropriate implantation site based on the location electrocardiogram. The system may, when the identified location is an appropriate implantation site, output an indication that the lead is at an appropriate implantation site. The system may, for each of one or more of tunneling electrocardiograms, determine whether the lead is at an effective position within the heart wall based on the tunneling electrocardiogram; and when the lead is at an effective position, output an indication that the lead is at an effective position.

The present disclosure relates generally to the field of medical devices for delivering artificial chordae tendineae in a patient. A system for adjusting tension in an artificial chordae tendineae includes an artificial chordae tendineae coupleable between a clip and an anchor. The clip is engageable with a leaflet of a heart valve while the anchor is engageable with a papillary muscle or heart wall. The anchor includes a body portion, and a locking portion coupleable with the artificial chordae tendineae and configured to allow movement of the artificial chordae tendineae in a first direction while preventing movement of the artificial chordae tendineae in a second direction opposite the first direction. An actuator is coupled to the locking portion for selectively releasing the locking portion to enable selective movement of the artificial chordae tendineae in the second direction.

A method for localizing the source of an arrhythmia within a heart wall is disclosed. The method involves accessing an indication of the source location of the arrhythmia within the endocardium. A normal vector is generated that is normal to the endocardium at the source location in the direction of the epicardium layer. An activation vector indicating the direction of electrical force of the heart during an initial stage of depolarization is determined. The depth angle between the normal vector and the activation vector is determined, and the depth of the source location within the heart wall is indicated based on a depth angle.

The application provides a heart wall thickness monitoring device, which comprises a medical catheter in direct contact with a heart wall, an impedance measuring instrument and a computing processing device storing a calibration matrix, wherein the medical catheter is used for generating an electric signal and measuring a contact pressure value of the medical catheter in direct contact with the heart wall; the impedance measuring instrument is electrically connected with the medical catheter and is used for converting the electric signal into an impedance value; the computing processing device is electrically connected with the medical catheter and the impedance measuring instrument, receives the contact pressure value and the impedance value, and finds a data group closest to the contact pressure value and the impedance value in the calibration matrix, and the heart wall thickness in the data group is the monitored heart wall thickness. The application realizes the problem of low-cost real-time monitoring of the tissue thickness of a target ablation site in an ablation operation process, and based on the real-time monitored tissue thickness, the ablation energy and the ablation duration of the medical catheter in the ablation process can be determined, so that the operation safety and the ablation treatment effect are improved.

Described here are wireless monitoring devices, systems, and methods for estimating one or more physiological parameters of a patient. These devices and systems may measure or receive a signal waveform transmitted through one or more of fluid and a physiological structure of a patient. This measured signal waveform may be processed to generate waveform parameter data used to estimate a physiological parameter such as blood velocity, heart wall thickness, and the like.

A method for localizing the source of an arrhythmia within a heart wall is disclosed. The method involves accessing an indication of the source location of the arrhythmia within the endocardium. A normal vector is generated that is normal to the endocardium at the source location in the direction of the epicardium layer. An activation vector indicating the direction of electrical force of the heart during an initial stage of depolarization is determined. The depth angle between the normal vector and the activation vector is determined, and the depth of the source location within the heart wall is indicated based on a depth angle.

This utility model discloses a dual-disc, one-piece biodegradable foramen ovale occluder for atrial septum. The occluder includes a first disc, a second disc, and an occluding part. The first and second discs are connected to the two ends of the occluding part. The first, second, and occluding parts are one-piece molded and biodegradable. Both the first and second discs are elastic components that can automatically return to their original shape. The plane containing the edge of the first disc is a first plane, and the plane containing the edge of the second disc is a second plane. The angle between the axis of the occluding part and the first plane is an acute angle, and / or the angle between the axis of the occluding part and the second plane is an acute angle. The occluder is a one-piece biodegradable component, which can avoid long-term complications and safety hazards caused by metal remaining in the body. Furthermore, the first and / or second discs are inclined relative to the occluding part, thereby allowing the first and second discs to adapt to different shapes of heart wall structures and improving the occlusion effect.

A system is provided for generating and displaying a sequence of three-dimensional (3D) graphics that illustrate motion of the heart over a cardiac cycle. The system generates a start heart wall mesh and an end heart wall mesh that represent a start geometry and an end geometry of a heart wall derived from a start 3D image and an end 3D image. The system then generates one or more an intermediate heart wall 3D meshes based on an intermediate geometry of the heart wall. An intermediate geometry is interpolated based on the start geometry and the end geometry factoring a start time of a start heart wall mesh, an end time of the end heart wall mesh, and an intermediate time for the intermediate heart wall mesh. The system then displays in sequence representations the heart wall 3D meshes to illustrate the motion.

A prosthetic valve can be formed to guide flow from an outflow orifice into a posterior portion of the heart wall. The prosthetic valve includes an expandable frame that can be covered by a cover that is seamlessly attached to the frame. The prosthetic valve may also include a controlled outflow orifice size. Methods of using these devices are also disclosed.

The invention discloses a double-disc-shaped integrally-formed degradable heart atrial septum foramen ovale plugging device which comprises a first disc part, a second disc part and a plugging part, the first disc part and the second disc part are connected to the two ends of the plugging part, and the first disc part, the second disc part and the plugging part are integrally-formed pieces and are degradable pieces; and the first disc part and the second disc part are elastic pieces capable of automatically restoring to original shapes. The plane where the edge of the first disc portion is located is a first plane, the plane where the edge of the second disc portion is located is a second plane, and the included angle between the axis of the plugging portion and the first plane is an acute angle and / or the included angle between the axis of the plugging portion and the second plane is an acute angle. The plugging device is an integrally-formed degradable part, and long-term complications and potential safety hazards caused by metal remaining in the body can be avoided. And the first disc part and / or the second disc part are / is obliquely arranged relative to the plugging part, so that the first disc part and the second disc part can adapt to heart wall surface structures in different shapes, and the plugging effect is improved.

Methods and systems provide for coordinating multiple different types of ablation modes, such as Radio Frequency (RF) ablations of tissue portions with Pulsed Field ablations (PFA), for ablating tissue portions, e.g., ablation sites in the tissue, during a procedure, such as an ablation procedure on a cardiac wall.

In some embodiments, a method includes delivering to a native valve annulus (e.g., a native mitral valve annulus) of a heart a prosthetic heart valve having a body expandable from a collapsed, delivery configuration to an expanded, deployed configuration. The method can further include, after the delivering, causing the prosthetic heart valve to move from the delivery configuration to the deployed configuration. With the prosthetic heart valve in its deployed configuration, an anchor can be delivered and secured to at least one of a fibrous trigone of the heart or an anterior native leaflet of the native valve. With the prosthetic heart valve disposed in the native valve annulus and in its deployed configuration, an anchoring tether can extending from the anchor can be secured to a wall of the heart to urge the anterior native leaflet towards the body of the prosthetic heart valve.

Disclosed are various configurations of electrodes with accompanying extensions and wires configured to be attached at or near the left atrium of a heart to allow the device to be held snug against the endocardium and out of the blood flow for low energy defibrillation of the atria in response to atrial fibrillation or other atrial arrhythmias. The portion of the lead internal to the atrium (e.g., the left atrium) is restrained against the endocardium of the left atrium by way of a restraint mechanism. In one example, the electrode is configured to attach to the atrial septum, with wires containing memory-shaped metal to keep the wires against the heart wall. In yet another example, the electrode is configured to be part of a mitral valve device.