Use of accelerometer signal to augment ventricular arrhythmia detection
First Claim
Patent Images
1. An implantable medical device, comprising:
- a plurality of electrodes for detecting electrical events of a patient;
a sensor for detecting mechanical events of the patient;
a controller receiving signals, indicative of the detected electrical events, from the plurality of electrodes, and receiving signals, indicative of the detected mechanical events, from the sensor;
the controller analyzing an amplitude, a rate, and a variability of the amplitude and the rate of the electrical event signals and the mechanical event signals, and comparing the rate of the electrical event signals with the rate of the mechanical event signals; and
the controller selecting a therapy and controlling the therapy delivered by the device to the patient in response to the comparison of the rate of the electrical event signals with the rate of the mechanical event signals, and, if the rate of the electrical event signals does not match the rate of the mechanical event signals, in response to the analysis of each of the signals, wherein the controller adjusts one of a sensing sensitivity corresponding to the detecting by the plurality of electrodes, if the rate of the electrical event signals does not match the rate of the mechanical event signals and the electrical event signals are fast and the mechanical event signals are not one of low amplitude and erratic, and a sensing sensitivity corresponding to the detecting by the sensor if the rate of the electrical event signals does not match the rate of the mechanical event signals and the rate of the electrical event signals is not fast and is not one of absent and erratic.
2 Assignments
0 Petitions
Accused Products
Abstract
A system and method for detecting and discriminating atrial arrhythmias based on mechanical signals of cardiac wall motion and electrical signals of cardiac depolarizations. A mechanical event rate determined from sensed mechanical events is used to corroborate an electrical event rate determined from sensed EGM or ECG signals to classify the heart rhythm. If the event rates are not correlated, other parameterized data from the mechanical signal and electrical signal are evaluated to detect evidence of an arrhythmia. If electrical and mechanical event data do not corroborate a common arrhythmia condition, electrical and mechanical sensing parameters may be adjusted.
256 Citations
15 Claims
-
1. An implantable medical device, comprising:
-
a plurality of electrodes for detecting electrical events of a patient; a sensor for detecting mechanical events of the patient; a controller receiving signals, indicative of the detected electrical events, from the plurality of electrodes, and receiving signals, indicative of the detected mechanical events, from the sensor; the controller analyzing an amplitude, a rate, and a variability of the amplitude and the rate of the electrical event signals and the mechanical event signals, and comparing the rate of the electrical event signals with the rate of the mechanical event signals; and the controller selecting a therapy and controlling the therapy delivered by the device to the patient in response to the comparison of the rate of the electrical event signals with the rate of the mechanical event signals, and, if the rate of the electrical event signals does not match the rate of the mechanical event signals, in response to the analysis of each of the signals, wherein the controller adjusts one of a sensing sensitivity corresponding to the detecting by the plurality of electrodes, if the rate of the electrical event signals does not match the rate of the mechanical event signals and the electrical event signals are fast and the mechanical event signals are not one of low amplitude and erratic, and a sensing sensitivity corresponding to the detecting by the sensor if the rate of the electrical event signals does not match the rate of the mechanical event signals and the rate of the electrical event signals is not fast and is not one of absent and erratic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for detecting arrhythmias in an implantable medical device, comprising:
-
detecting electrical event signals of a patient; detecting mechanical event signals of the patient; analyzing an amplitude, a rate, and a variability of the amplitude and the rate of the electrical event signals and the mechanical event signals; comparing the rate of the electrical event signals with the rate of the mechanical event signals; selecting a therapy and controlling the therapy delivered by the device to the patient in response to the comparison of the rate of the electrical event signals with the rate of the of the mechanical event signals and, if the rate of the electrical event signals does not match the rate of the mechanical event signals, in response to the analysis of each of the signals; and adjusting a sensing sensitivity for the detecting of the electrical event signals if the rate of the electrical event signals does not match the rate of the mechanical event signals and the electrical event signals are fast and the mechanical event signals are not one of low amplitude and erratic. - View Dependent Claims (12, 13, 14)
-
-
15. A method for detecting arrhythmias in an implantable medical device, comprising:
-
detecting electrical event signals of a patient; detecting mechanical event signals of the patient; analyzing an amplitude, a rate, and a variability of the amplitude and the rate of the electrical event signals and the mechanical event signals; comparing the rate of the electrical event signals with the rate of the mechanical event signals; selecting a therapy and controlling the therapy delivered by the device to the patient in response to the comparison of the rate of the electrical event signals with the rate of the of the mechanical event signals and, if the rate of the electrical event signals does not match the rate of the mechanical event signals, in response to the analysis of each of the signals; and adjusting a sensing sensitivity for the detecting of the mechanical event signals if the rate of the electrical event signals does not match the rate of the mechanical event signals and the rate of the electrical event signals is not fast and is not one of absent and erratic.
-
Specification