Abstract:
Systems and methods employ an energy emitting electrode (16) to heat tissue. The systems and methods follow a prescribed temperature set curve in which a set point temperature changes over time to control the application of energy to the electrode (16).
Abstract:
This invention is systems and methods to examine heart tissue morphology using a pair of electrodes (38), at least one of which is located in contact with heart tissue (12). The systems and methods transmit electrical current in a path through the contacted heart tissue (12) between the pair of the electrodes to derive a tissue electrical characteristic based, at least in part, upon sensing the impedance of the tissue lying in the path. The system and methods also sense with at least one of the electrodes the timing of local depolarization events in the contacted heart tissue. The systems and methods make possible the use of multiple endocardial electrodes (30) for taking multiple measurements of the electrical characteristics of heart tissue. Multiplexing can be used to facilitate data processing. The systems and methods also make possible the identification of regions of low relative electrical characteristics, indicative of infarcted tissue, without invasive surgical techniques.
Abstract:
This invention is systems and methods to examine heart tissue morphology using three or more spaced electrodes (38), at least two of which are located within the heart in contact with endocardial tissue. The systems and methods transmit electrical current through a region of heart tissue lying between selected pairs of electrodes (224), at least one of the electrodes in each pair being located within the heart. The systems and methods derive the electrical characteristic of tissue between the electrode pairs (206) based, at least in part, upon sensing tissue impedances.
Abstract:
A device for creating lesions in body tissues includes a support element (98) having an electromagnetic energy emitting region (104). When caused to emit energy, the region (104) creates a single continuous lesion that is long and thin.
Abstract:
An electrode support for use in an intraventricular cardiac diagnosis and treatment includes at least one elongated spline (76) that carries at least one electrode (22). The spline has a rectangular cross section. It has a substantially greater width than thickness. The spline can be flexed in one vertical plane that passes through its longitudinal axis. The spline resists twisting and resists flexing in all other planes passing through the axis.
Abstract:
Devices for insertion into an atrial appendage of stasis reducing components such as mesh members, chemical bonding agents or expandable anchors are disclosed.
Abstract:
Electrode assemblies and associated systems employ a nonporous wall having an exterior for contacting tissue. The exterior peripherally surrounds an interior area. The wall is essentially free of electrically conductive material. The wall is adapted to assume an expanded geometry having a first maximum diameter and a collapsed geometry having a second maximum diameter less than the first maximum diameter. The assemblies and systems include a lumen that conveys a medium containing ions into the interior area. An element free of physical contact with the wall couples the medium within the interior area to a source of electrical energy to enable ionic transport of electrical energy from the source through the medium to the wall for capacitive coupling to tissue contacting the exterior of the wall.
Abstract:
A system records use of a structure deployed in operative association with heart tissue in a patient. An image controller generates an image of the structure while in use in the patient. An input receives data including information identifying the patient. An output processes the image in association with the data as a patient-specific, data base record for storage, retrieval, or manipulation.
Abstract:
An electrode support structure has a slotted hub and an integral body with a mid-section and opposed pair of spline elements that extend from the mid-section. The mid-section is captured within the slot, securing the integral body to the hub with the opposed spline elements radiating free of the slot for carrying one or more electrodes.