274 results about "Cardiac chamber" patented technology

A catheter which may be configured as a loop during an ablation procedure, and a method of use for such a catheter, are disclosed. According to one aspect of the present invention, an ablation catheter includes a flexible distal member arranged to inserted into a first vessel in the body of a patient, and an elongated flexible tubular member with a distal portion which is coupled to a proximal portion of the flexible distal member. The elongated flexible tubular member has a flexibility that is greater than or equal to the flexibility of the flexible distal member. The catheter also includes a transmission line which is at least partially disposed within the elongated flexible tubular member. A proximal end of the transmission line is suitable for connection to an electromagnetic energy source. The catheter further includes a transducer that is coupled to the transmission line, and is arranged to generate an electric field sufficiently strong to cause tissue ablation. In one embodiment, a distal portion of the flexible distal member is arranged to protrude from a second vessel of the body of the patient while at least part of the elongated flexible tubular member is located in a cardiac chamber of the heart of the patient.

The various aspects of the invention pertain to devices and related methods for treating heart conditions, including, for example, dilatation, valve incompetencies, including mitral valve leakage, and other similar heart failure conditions. The devices and related methods of the present invention operate to assist in the apposition of heart valve leaflets to improve valve function. According to one aspect of the invention, a method improves the function of a valve of a heart by placing an elongate member transverse a heart chamber so that each end of the elongate member extends through a wall of the heart, and placing first and second anchoring members external the chamber. The first and second anchoring members are attached to first and second ends of the elongate member to fix the elongate member in a position across the chamber so as to reposition papillary muscles within the chamber. Also described herein is a method for placing a splint assembly transverse a heart chamber by advancing an elongate member through vasculature structure and into the heart chamber.

Diagnostic and surgical procedures may be performed on a beating heart using an assembly which includes a port and a fluid transport device. The port has a housing for insertion through a wall of the heart chamber and may include one valve disposed in the housing and an inlet connected to the housing. Methods for repair and diagnosis of the heart are also described. A specific method for repairing a mitral valve uses staples which may be banded together with a strip of material.

The present invention comprises a method for deploying an aortic valve prosthesis. This valve prosthesis may include any of the known aortic valves including, but not limited to, stented and unstented bioprosthetic valves, stented mechanical valves, and expandable or self-expanding valves, whether biological or artificial. The method involves the steps of: making a first opening leading to the left atrium; passing a valve prosthesis through the opening and into a cardiac chamber of the left side of the heart using a first manipulation instrument; making a second opening in the arterial system and advancing one end of a second manipulation instrument through the arterial opening and into the aforementioned cardiac chamber; securing the second manipulation instrument to the valve prosthesis; and using the second manipulation instrument to retract at least some portion of the valve prosthesis out of the aforementioned cardiac chamber.

A leadless intra-cardiac medical device senses cardiac activity from multiple chambers and applies cardiac stimulation to at least one cardiac chamber and/or generates a cardiac diagnostic indication. The leadless device may be implanted in a local cardiac chamber (e.g., the right ventricle) and detect near-field signals from that chamber as well as far-field signals from an adjacent chamber (e.g., the right atrium).

This invention is directed to a partitioning device for separating a patient's heart chamber into a productive portion and a non-productive portion. The device is particularly suitable for treating patients with congestive heart failure. The partitioning device has a reinforced, expandable membrane which separates the productive and non-productive portions of the heart chamber and a support or spacing member extending between the reinforced membrane and the wall of the patient's heart chamber. The support or spacing member has a non-traumatic distal end to engage the ventricular wall.

Implantable medical devices (IMDs) for monitoring signs of acute or chronic cardiac heart failure by measuring cardiac blood pressure and mechanical dimensions of the heart and providing multi-chamber pacing optimized as a function of measured blood pressure and dimensions are disclosed. The dimension sensor or sensors comprise at least a first sonomicrometer piezoelectric crystal mounted to a first lead body implanted into or in relation to one heart chamber that operates as an ultrasound transmitter when a drive signal is applied to it and at least one second sonomicrometer crystal mounted to a second lead body implanted into or in relation to a second heart chamber that operates as an ultrasound receiver. The ultrasound receiver converts impinging ultrasound energy transmitted from the ultrasound transmitter through blood and heart tissue into an electrical signal. The time delay between the generation of the transmitted ultrasound signal and the reception of the ultrasound wave varies as a function of distance between the ultrasound transmitter and receiver which in turn varies with contraction and expansion of a heart chamber between the first and second sonomicrometer crystals. One or more additional sonomicrometer piezoelectric crystal can be mounted to additional lead bodies such that the distances between the three or more sonomicrometer crystals can be determined. In each case, the sonomicrometer crystals are distributed about a heart chamber such that the distance between the separated ultrasound transmitter and receiver crystal pairs changes with contraction and relaxation of the heart chamber walls.

The current invention discloses a delivery catheter with a selectively formable distal section. The catheter comprises a central lumen that is configured to receive a puncture catheter that is used for puncturing the septum of a heart and to emplace devices used for treating mitral regurgitation. The delivery catheter includes control members disposed in a control lumen, and a plurality curved areas can be selectively formed in the distal section of the delivery catheter by applying tension to the control members. A first curve is shaped to conform to the interior of a heart chamber and a combination of the first curve and a second curve allows a clinician to manipulate the distal end of the catheter for selection of the proper vector for deploying a treatment device, or for guiding a treatment device around obstacles in a heart chamber.

A method and device for the treatment of a patient with heart disease and particularly a heart chamber having a myocardial rupture or characteristics of an incipient myocardial rupture. The heart chamber is partitioned so as to isolate a non-productive portion having a rupture or a region of an incipient rupture from a productive portion. The heart chamber is preferably partitioned with a reinforced membrane which has a pressure receiving surface that defines part of the productive portion of the heart chamber. The peripheral base of the reinforced membrane may have an eccentric configuration.

This invention is directed to a partitioning device for separating a patient's heart chamber into a productive portion and a non-productive portion which is suitable for treating patients with heart disease, particularly congestive heart failure. The partitioning device has a reinforced membrane with outwardly biased members to help seal the periphery of the membrane against the wall of the patient's heart chamber. In one embodiment, the outwardly biased member is an expansive strand that extends between adjacent ribs of an expandable frame which reinforces the membrane. In another embodiment, the outwardly biased member is a hydrophilic body such as foam which swells upon contact with body fluid such as blood in the heart chamber. The reinforced membrane has a central hub with a distally extending support stem with a plurality of feet which extend radially from a centerline axis and preferably have ends that are aligned in a common plane. The ends of the pods which extend radially away from the centerline axis may be interconnected by flexible struts and/or webs.

Methods and devices for forming an anastomosis during a bypass procedure utilize a graft vessel secured to a vessel coupling adapted to be fixed to a target vessel without using suture. The graft vessel is placed in fluid communication with a heart chamber containing blood. The vessel coupling may be collapsed for introduction into the target vessel and then expanded to fix the coupling thereto. The vessel coupling may be a stent with the graft vessel secured thereto to form a stent-graft assembly. The anastomosis is carried out to place the graft and target vessels in fluid communication while preserving native proximal flow through the target vessel, which may be a coronary artery. As a result, blood flowing from the aorta and past an obstruction in the coronary artery is not blocked by formation of the anastomosis; rather, such proximal blood flow is free to move past the vessel coupling and the anastomosis.

A method is provided for ablation in treatment of heart arrhythmias such as atrial fibrillation that includes positioning a catheter apparatus with multiple electrodes within a cardiac chamber, visualizing the catheter apparatus with an interventional system, navigating the catheter apparatus within the cardiac chamber, and delivering energy to selected electrodes of the catheter apparatus from an external source to ablate heart tissue at select locations. Preferably, the external source is an external patch placed on the patient for the delivery of radio-frequency energy. The electrodes of the catheter apparatus are connected to the patch through a patient interface unit where the interface unit selects the electrodes to which radio-frequency energy is to be delivered. In another aspect of the invention, a system for ablation of heart arrhythmias is provided that has a catheter apparatus with multiple electrodes, an interventional system for visualizing the catheter apparatus within a cardiac chamber, and an external source for delivering energy to selected electrodes of the catheter apparatus within the cardiac chamber to ablate heart tissue. Preferably, the system further includes a digital imaging system for obtaining cardiac image data, an image generation system for generating a 3D model of the cardiac chamber from the cardiac image data, and a workstation for registering the 3D model with the interventional system and for visualizing the catheter apparatus over this registered 3D model upon the interventional system.

Some embodiments of pacing systems employ wireless electrode assemblies to provide pacing therapy. The wireless electrode assemblies may wirelessly receive energy via an inductive coupling so as to provide electrical stimulation to the surrounding heart tissue. In certain embodiments, the wireless electrode assembly may include one or more biased tines that shift from a first position to a second position to secure the wireless electrode assembly into the inner wall of the heart chamber.

A system for removing undesirable material from vessels and from chambers within the heart is provided. The system includes a suction cannula for removing the undesirable material from a site of interest within a patient. A filter device may be provided for capturing the undesirable material and removing it from the fluid flow. The system also includes pump for generating the necessary suction force through the suction cannula to dislodge the undesirable material from the site of interest and for generating a sufficient driving force to direct the fluid flow downstream within the system. The system further includes a reinfusion cannula for introducing fluid removed from the site of interest back into a patient. A method for removing undesirable material from vessels and from heart chambers is also provided.

A method is provided for treatment of a heart arrhythmia such as atrial fibrillation that includes obtaining cardiac image data using a digital imaging system, generating a 3D model of a cardiac chamber and surrounding structures from such cardiac image data, registering the 3D model with an interventional system, visualizing this registered 3D model on the interventional system, positioning a catheter apparatus within the cardiac chamber, visualizing the catheter apparatus over the registered 3D model of the cardiac chamber upon the interventional system, navigating the catheter apparatus within the cardiac chamber utilizing this registered 3D model, and delivering biological material through the catheter apparatus to heart tissue at select locations within the cardiac chamber. Preferably, the biological material are transplanted cells or antibodies. In another aspect of the invention, a system for treatment of heart arrhythmias is provided that has a digital imaging system to obtain cardiac image data, an image generation system to generate a 3D model of a cardiac chamber and its surrounding structures from this cardiac image data, a workstation to register the 3D model onto an interventional system so that the registered 3D model can be visualized upon the interventional system, and a catheter apparatus to deliver biological material such as transplanted cells or antibodies to heart tissue within this cardiac chamber at certain select locations, the catheter apparatus being visualized upon the interventional system over the registered 3D model.

This invention is directed to a device and method of using the device for partitioning a patient's heart chamber into a productive portion and a non-productive portion. The device is particularly suitable for treating patients with congestive heart failure. The device has an inflatable partitioning element which separates the productive and non-productive portions of the heart chamber and in some embodiments also has a supporting element, which may also be inflatable, extending between the inflatable partitioning element and the wall of the non-productive portion of the patient's heart chamber. The supporting element may have a non-traumatic distal end to engage the ventricular wall or a tissue penetrating anchoring element to secure the device to the patient's heart wall.