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.
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Accused Products
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.
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Citations
16 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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An implantable cardiac stimulation device for implant within a patient comprising:
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control means for controlling selected functions of the device;
storage means for storing sets of control parameters for use by the control means, each set specifying one or more of AV/PV delay, refractory period, and overdrive pacing parameters, diagnostic-data gathering parameters and defibrillation capacitor charging parameters, the storage means storing a first set of control parameters for use while the patient is at rest and a second set of control parameters for use while the patient is not at rest;
sensor means for determining whether the patient is at rest; and
means for determining whether the patient is prone to rest-related physiologic problems; and
wherein the controller means inputs the first set of control parameters from the storage means if the sensor means determines that the patient is at rest and if the means for determining determines that the patient is prone to rest-related physiologic problems, wherein the first set is for use in controlling the selected functions of the device and inputs the second set of control parameters from the storage means if the sensor means determines that the patient is not at rest for use in controlling the selected functions of the device. - View Dependent Claims (9, 10)
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11. An implantable cardiac stimulation device for implant within a patient comprising:
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a pulse generator that is operative to generate pacing pulses for applying to the heart of a patient;
a sensor that is operative to provide a signal indicative of whether the patient is at rest; and
a controller that is operative to control selected functions of the stimulation device based on a first set of parameters if the patient is at rest and if the patient is prone to rest-related physiologic problems, and based on a second set of parameters if the patient is not at rest. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification