Auto adaptation of RR interval in implantable pacemaker
First Claim
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1. An implantable pacemaker comprising:
- a sensor for sensing intrinsic events in a patient'"'"'s heart, and generating sensed cardiac signals;
a pace generator for generating pacing signals in response to commands;
a metabolic sensor for sensing a metabolic demand of a patient and generating in response a metabolic demand signal;
a physical fitness determinator for sensing a long term physical fitness of said patient and generating in response a physical fitness indicator; and
a controller receiving said sensed cardiac signals, said metabolic demand signal and said physical fitness indicator and generating in response said commands.
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Abstract
In an implantable rate responsive pacemaker a metabolic demand parameter is mapped in accordance with a rate response function into a corresponding metabolic indicated rate for pacing a patient'"'"'s heart. In addition, a physical fitness monitor is also provided which monitors the patient'"'"'s physical fitness and generates a long term true and accurate physical indicia. This indicia is used to adjust the rate response function so that it is automatically adjusted to the physical fitness of the patient.
75 Citations
18 Claims
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1. An implantable pacemaker comprising:
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a sensor for sensing intrinsic events in a patient'"'"'s heart, and generating sensed cardiac signals; a pace generator for generating pacing signals in response to commands; a metabolic sensor for sensing a metabolic demand of a patient and generating in response a metabolic demand signal; a physical fitness determinator for sensing a long term physical fitness of said patient and generating in response a physical fitness indicator; and a controller receiving said sensed cardiac signals, said metabolic demand signal and said physical fitness indicator and generating in response said commands. - View Dependent Claims (2, 3, 4, 5)
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6. An implantable pacemaker comprising:
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a cardiac sensor for sensing intrinsic cardiac activity; a pacing generator for generating pacing signals in accordance with said intrinsic cardiac activity; an activity sensor for sensing physical activity by said patient over a prolonged time period; a memory for collecting a total exercise duration during said prolonged time period; and output for generating from said memory a physical fitness indicia for said patient. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A rate responsive implantable pacemaker for pacing a patient in an optimized hemodynamic mode, said pacemaker comprising:
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a cardiac sensor for sensing intrinsic cardiac activity in a cardiac chamber and generating a sensed signal; a pacing pulse generator for generating pacing pulses to the patient'"'"'s heart in response to pacing commands; a physical fitness monitor for monitoring the actual physical fitness of the patient, said monitor generating a physical fitness indicia; an activity sensor sensing physical activity of the patient and generating in response a metabolic demand parameter; a mapping member for mapping said metabolic demand parameter into a metabolic indicated parameter in accordance with a preselected profile; and a controller for generating said pacing commands in accordance with said sensed signal, said physical fitness indicia and said metabolic demand parameter. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification