Abstract:
Approaches for rate initialization and overdrive pacing used during capture threshold testing are described. Cardiac cycles are detected and the cardiac events of a cardiac chamber that occur during the cardiac cycles are monitored. The number of intrinsic beats in the cardiac events is counted. Initialization for a capture threshold test involves maintaining a pre-test pacing rate for the capture threshold test if the number of intrinsic beats in the cardiac events is less than a threshold. The pacing rate is increased for the capture threshold test if the number of intrinsic beats in the cardiac events is greater than the threshold.
Abstract:
Systems, methods, and apparatus for identifying and classifying noise of an intracardiac electrogram of a cardiac rhythm management device to prevent inaccurate detection of a cardiac episode are disclosed. In an example, three channels are analyzed to identify and determine whether an episode or noise has been detected.
Abstract:
A system and method for automatically adjudicating arrhythmia episode information is described, and includes an episode database having episode data regarding a plurality of different arrhythmia episodes and an adjudication processor configured to output characterization data characterizing the input episode data. The characterization data includes an arrhythmia classification. The system further includes an episode processor configured to process the characterization data and episode data, provide at least one report on the characterization data related to a plurality of the different arrhythmia episodes, and provide at least one programming recommendation or at least one alert.
Abstract:
Cardioprotective pre-excitation pacing may be applied to stress or de-stress a particular myocardial region delivering of pacing pulses in a manner that causes a dyssynchronous contraction. Such dyssynchronous contractions are responsible for the desired cardioprotective effects of pre-excitation pacing. A method and device for applying reverse hysteresis and mode switching to the delivery of such cardioprotective pacing are described.
Abstract:
A system and method for performing independent, off-line evaluation of event sensing for collected electrograms, comprising: sensing an electrogram using an implantable medical device (IMD); determining locations of heart beats on at least one channel of the electrogram using a multi-pass process, resulting in a group of multi-pass beat locations; storing the electrogram and device-identified beat locations in a memory location; and retrieving the electrogram and device-identified beat locations from the memory location. The multi-pass process determines locations of heart beats on at least a first channel of the electrogram. The device-identified group of beat locations are then compared to the multi-pass group of beat locations identified using the multi-pass method. Based on the comparing step, oversensing of beats, undersensing of beats, or noise from the device can be detected.
Abstract:
Monitoring physiological parameter using an implantable physiological monitor in order to detect a condition predictive of a possible future pathological episode and collecting additional physiological data associated with the condition predictive of a possible future pathological episode. Monitoring, using the physiological monitor, another physiological parameter in order to detect a condition indicative of the beginning of a present pathological episode and collecting additional pathological data in response to the condition. Determining that the condition predictive of a future episode and the condition indicative of a present episode are associated and, in response thereto, storing all the collected physiological data.
Abstract:
An implantable device including a programmable controller can be used to include a user-specifiable therapy control parameter set. The therapy control parameter set may then be configured to include at least one therapy control parameter that is user-configurable to automatically switch from a first parameter value to a second parameter value at a time that occurs between separate user programming sessions of the device. A remote external interface can be included that is configured to be communicatively coupled to the device. The remote external interface can be configured to perform an analysis of physiologic data received from the device in response to operation of the device using a plurality of therapy control parameter sets. The remote external interface can further be configured to select a particular therapy control parameter set using the analysis.
Abstract:
Systems and methods provide for pacing a heart to improve pumping efficiency of the heart, such as by producing a cardiac fusion response for patient's subject to cardiac ^synchronization therapy. A pacing parameter, such as an A-V delay, V-V delay, lead/electrode configuration or vector, is adjusted and a cardiac signal vector representative of all or a portion of one or more cardiac activation sequences is monitored during pacing parameter adjustment. A change in a characteristic of the cardiac signal vector is detected in response to an adjusted pacing parameter, the change indicative of a cardiac fusion response. A pacing therapy may be delivered to produce the cardiac fusion response using the adjusted pacing parameter.
Abstract:
A system (10) and method (30) for providing authentication of remotely collected external sensor (17) measures is presented. Physiological measures (37) are collected (31) from a source (17) situated remotely from a repository (18) for accumulating such collected physiological measures (37). An identification (32) of the source from which the physiological measures (37) were collected (31) is determined against authentication data (82) that uniquely identifies a specific patient (14). The physiological measures (37) are forwarded (33) to the repository upon authenticating the patient identification (80) as originating from the specific patient (14).
Abstract:
Discrimination between different types of possible cardiac pacing responses may depend on the timing of expected features that are sensed within a temporal framework. The temporal framework may include classification intervals, blanking periods and appropriately timed back up paces. The classification intervals and blanking periods of the temporal framework are intervals of time that have time parameters that include start time, end time, and length. The relationships and timing parameters of the elements of the temporal framework, e.g., blanking periods, classification intervals, delay periods, and backup pacing, should support detection of features used to discriminate between different types of pacing responses. As the system learns the morphology of the particular patient by analyzing the waveform of the pacing response signal, the temporal framework for pacing response determination may be adjusted to accommodate the individual patient.