摘要:
An implantable cardioverter defibrillator (ICD) automatically determines whether to use electrogram (EGM) signals sensed by a true bipolar electrode pair or those sensed by an integrated bipolar electrode pair. EGM signals from both the true bipolar pair and the integrated bipolar pair are simultaneously sensed and compared to determine which pair produced more accurate sensing of cardiac events. The more accurate source of EGM signals is selected and used in determining the therapy to be delivered.
摘要:
A method and apparatus for cardiac pacing and, more particularly, for Atrial-His-Ventricular sequential pacing to improve sino-atrial node dysfunction or heart block superior to the His bundle. As a derivative, His-Ventricular sequential pacing can be employed to treat permanent atrial fibrillation.
摘要:
A method for preventing early recurrence of atrial fibrillation by pacing a heart in AAI mode at a rate faster than the intrinsic rate for a selected period of time immediately after delivering therapy to terminate the fibrillation. Ventricular backup pacing in VVI mode may also be provided during the atrial pacing.
摘要:
A preferred atrial-based pacing method and apparatus is provided using an intelligent cardiac pacing system to having the ability to continue atrial-based pacing as long as relatively reliable AV conduction is present. In the event that such relatively reliable AV conduction is not present, mode switching to a DDD/R or a DDI/R pacing mode while continually biased to mode switch back to atrial-based pacing. The standard or relatively reliable AV conduction may be changed either automatically or manually. This increases pacing that utilizes natural AV conduction however possible so as to gain all the benefits of cardiac contractile properties resulting therefrom, while tolerating the occasional missed ventricular depolarization (i.e., non-conducted P-wave). In the event where relatively reliable AV conduction is not present, the pacing mode is switched to a DDD/R mode while detecting a return of the relatively reliable AV conduction (and resulting mode switch to preferred atrial based pacing).
摘要:
The invention is directed to an implantable medical device that stimulates a nerve associated with respiration. The nerve may, for example be a phrenic nerve, and the stimulation may cause a diaphragm of the patient to contract. The implantable medical device receives a signal that indicates a need for increased cardiac output and stimulates the nerve in response to the signal. The implantable medical device may receive such a signal by, for example, detecting a ventricular tachyarrhythmia, sensing a pressure that indicates a need for increased cardiac output, or receiving a signal from a patient via a patient activator. Stimulation of the nerve may increase cardiac output of a beating or defibrillating heart
摘要:
A preferred atrial-based pacing method and apparatus is provided using an intelligent cardiac pacing system to having the ability to continue atrial-based pacing as long as relatively reliable AV conduction is present. In the event that such relatively reliable AV conduction is not present, mode switching to a DDD/R or a DDI/R pacing mode while continually biased to mode switch back to atrial-based pacing. The standard or relatively reliable AV conduction may be changed either automatically or manually. This increases pacing that utilizes natural AV conduction however possible so as to gain all the benefits of cardiac contractile properties resulting therefrom, while tolerating the occasional missed ventricular depolarization (i.e., non-conducted P-wave). In the event where relatively reliable AV conduction is not present, the pacing mode is switched to a DDD/R mode while detecting a return of the relatively reliable AV conduction (and resulting mode switch to preferred atrial based pacing).
摘要:
The invention is directed to an implantable medical device that stimulates a nerve associated with respiration. The nerve may, for example be a phrenic nerve, and the stimulation may cause a diaphragm of the patient to contract. The implantable medical device receives a signal that indicates a need for increased cardiac output and stimulates the nerve in response to the signal. The implantable medical device may receive such a signal by, for example, detecting a ventricular tachyarrhythmia, sensing a pressure that indicates a need for increased cardiac output, or receiving a signal from a patient via a patient activator. Stimulation of the nerve may increase cardiac output of a beating or defibrillating heart
摘要:
Pacing parameters are provided to address cross talk and intrinsic ventricular events occurring within a predefined blanking period following an atrial event. The parameters are used in conjunction with protocol for minimizing or reducing ventricular pacing, wherein ignoring intrinsic ventricular events during the blanking period might otherwise affect the performance of the protocol.
摘要:
A method for preventing early recurrence of atrial fibrillation by pacing a heart in AAI mode at a rate faster than the intrinsic rate for a selected period of time immediately after delivering therapy to terminate the fibrillation. Ventricular backup pacing in VVI mode may also be provided during the atrial pacing.
摘要:
A method and apparatus for cardiac pacing and, more particularly, for Atrial-His-Ventricular sequential pacing to improve sino-atrial node dysfunction or heart block superior to the His bundle. As a derivative, His-Ventricular sequential pacing can be employed to treat permanent atrial fibrillation.