Method and apparatus for using a rest mode indicator to automatically adjust control parameters of an implantable cardiac stimulation device
First Claim
1. In an implantable cardiac stimulation device for implant within a patient having a controller for controlling functions of the cardiac stimulation device, a method comprising:
- determining whether the patient is prone to rest-related physiologic problems;
determining whether the patient is at rest; and
controlling selected functions of the cardiac stimulation device based on a first set of parameters while the patient is at rest and a second set of parameters while the patient is not at rest, with sets of parameters specifying one or more of AV/PV delay, refractory period, overdrive pacing parameters, diagnostic-data gathering parameters and defibrillation capacitor charging parameters;
wherein the controller further employs a set of vagally-mediated arrhythmia (VMA) rest-mode control parameters and further comprising;
detecting whether the patient is prone to vagally-mediated arrhythmias; and
while the patient is at rest, controlling selected functions of the cardiac stimulation device using the VMA rest-mode control parameters if the patient is prone to vagally-mediated arrhythmias and using the first set of parameters if the patient is not prone to prone to vagally-mediated arrhythmias.
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Abstract
An implantable cardiac stimulation device is described wherein a controller of the cardiac stimulation device controls selected functions of the device based on whether the patient is at rest and further based on whether the patient is prone to vagally-mediated arrhythmias. Functions of the device that may be controlled include, for example, a pacing base rate, an AV/PV delay, and a refractory period as well as overdrive pacing parameters and diagnostic data gathering parameters. In one example, if the patient is not prone to vagally-mediated arrhythmias, the base rate is lowered while the patient is at rest. Also, overdrive pacing parameters are set to be less aggressive. As such, the operation of the cardiac stimulation device is controlled to make it easier for the patient to rest while also reducing power consumption. However, if the patient is prone to vagally-mediated arrhythmias, the base rate is not lowered while the patient is at rest. Overdrive pacing parameters are instead set to be more aggressive, rather than less aggressive. In this manner, the cardiac stimulation device attempts to compensate for any increased risk of arrhythmia that may occur while the patient, who is prone to vagally-mediated arrhythmias, is at rest. Numerous other parameters may be adjusted dependent upon whether the patient is at rest or dependent upon whether the patient is prone to vagally-mediated arrhythmias.
15 Citations
6 Claims
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1. In an implantable cardiac stimulation device for implant within a patient having a controller for controlling functions of the cardiac stimulation device, a method comprising:
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determining whether the patient is prone to rest-related physiologic problems; determining whether the patient is at rest; and controlling selected functions of the cardiac stimulation device based on a first set of parameters while the patient is at rest and a second set of parameters while the patient is not at rest, with sets of parameters specifying one or more of AV/PV delay, refractory period, overdrive pacing parameters, diagnostic-data gathering parameters and defibrillation capacitor charging parameters; wherein the controller further employs a set of vagally-mediated arrhythmia (VMA) rest-mode control parameters and further comprising; detecting whether the patient is prone to vagally-mediated arrhythmias; and while the patient is at rest, controlling selected functions of the cardiac stimulation device using the VMA rest-mode control parameters if the patient is prone to vagally-mediated arrhythmias and using the first set of parameters if the patient is not prone to prone to vagally-mediated arrhythmias. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification