摘要:
A cardiac rhythm management system for providing a plurality of therapy modalities. For example, the system may include a cardiac resynchronization therapy module for providing cardiac resynchronization therapy and a pacemaker module for providing bradycardia therapy, as well as a selector module coupled to the cardiac resynchronization therapy module and the bradycardia module. The selector module may select an operating mode from among a plurality of operating modes including the cardiac resynchronization therapy module and the pacemaker module. Various manual and automatic methods may be used to select the operating mode. In addition, a reversion management system may be included to assist the cardiac rhythm management system to recover in case of a disruption to the system.
摘要:
A cardiac rhythm management device is configured to detect oscillations in cardiac rhythm by comparing electrogram signals during successive heart beats. Upon detection of electrical alternans, the device may adjust its operating behavior to compensate for the deleterious effects of the condition.
摘要:
A method and system are disclosed for setting the pacing parameters utilized by an implantable cardiac device in delivering cardiac resynchronization therapy. The system may, in different embodiments, be implemented in programming of the implantable device and an external programmer in communication therewith or in the programming of the implantable device by itself. The selection of the pacing parameters is based at least in part upon measurements of intrinsic cardiac conduction parameters. Among the pacing parameters which may be selected in this way are the atrio-ventricular delay interval used in atrial-tracking and AV sequential pacing modes and the biventricular offset interval.
摘要:
A cardiac rhythm management device is configured to detect oscillations in cardiac rhythm by comparing electrogram signals during successive heart beats. Upon detection of electrical alternans, the device may adjust its operating behavior to compensate for the deleterious effects of the condition.
摘要:
A cardiac rhythm management system includes an implantable device executing a dynamic pacing algorithm after an myocardial infarction (MI) event. The dynamic pacing algorithm dynamically adjusts one or more pacing parameters based on a person's gross physical activity level. Examples of the one or more pacing parameters include atrioventricular pacing delays and pacing channels/sites. The dynamic pacing algorithm provides for improved hemodynamic performance when a person's metabolic need is high, and post MI remodeling control when the person's metabolic need is low.
摘要:
The invention is a process useful for providing a treated support comprising a porous nanoweb coating wherein the treated support is characterized by a biofilm cell count of less than 50% that of an untreated porous support control. The process is useful for modifying porous materials, such as filter media and barrier fabrics to provide resistance to biofouling. The porous nanoweb coating is comprised of fibrous structures derived from gelation and drying of supramolecular assemblies of non-covalently bonded organogelators. Typical organogelators useful in the invention include those that assemble via hydrogen bonding and π-stacking.
摘要:
Systems and methods to optimize atrioventricular delay during sensing or pacing of the atrium and for a plurality of sensed rates or pacing rates. In one example, a paced atrioventricular delay is calculated using a sensed atrioventricular interval and a paced atrioventricular interval. In another example, a plurality of paced atrioventricular delays for different pacing rates can be calculated. In another example embodiment, a plurality of sensed atrioventricular delays for different sensing rates can be calculated. Combinations of the various systems and methods are also possible.
摘要:
A system and method for identifying patients with asynchronous ventricular contractions due to abnormal electro-mechanical coupling and computing optimal pacing parameters for restoring synchronous contractions is disclosed. Such patients may have normal intra-ventricular and inter-ventricular conduction and cannot be identified from intrinsic conduction data alone such as QRS width. Techniques for computing optimal resynchronization pacing in order to compensate for abnormal electro-mechanical coupling are also described.
摘要:
A method is presented by which an implantable cardiac rhythm management device may vary the atrio-ventricular delay or AVD interval used for delivering cardiac resynchronization therapy in an atrial tracking or AV sequential pacing mode in accordance with the sensed or paced atrial rate. Optimal values for the AVD parameter associated with a particular atrial rate are computed as linear functions of an intrinsic conduction measurement taken when the particular rate is present.
摘要:
A cardiac rhythm management device is configured to detect oscillations in cardiac rhythm by measuring the amplitudes of heart sounds during successive heart beats. Upon detection of acoustic alternans, the device may adjust its operating behavior to compensate for the deleterious effects of the condition.