System and method for analyzing the efficacy of cardiac stimulation therapy
First Claim
1. A system, including an implantable cardiac stimulation device, for analyzing efficacy of cardiac stimulation therapy by storing and displaying historical data related to episodes of cardiac stimulation therapy, the system comprising:
- sensing means for sensing a patient'"'"'s cardiac rhythm which changes as a function of time;
detection means for detecting a plurality of pathological cardiac rhythms;
means for classifying each episode of a cardiac rhythm into one of a plurality of rate zones;
stimulation means for delivering cardiac stimulation therapy to a patient'"'"'s heart based on the rate zone of the cardiac rhythm;
means for storing data related to each episode of cardiac stimulation therapy as a function of time, the data including information indicative of the cardiac stimulation therapy delivered, the rate zone in which the cardiac rhythm was classified and the time that the cardiac stimulation therapy was delivered; and
display means, telemetrically coupled to the storing means, for graphically displaying the data along an x-axis and a y-axis as a function of the time that the cardiac stimulation therapy was delivered;
whereby the plurality of rate zones are displayed along the y axis and the time that each episode of cardiac stimulation therapy was delivered is displayed along the x axis.
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Accused Products
Abstract
An implantable stimulation device (ISD) for recording and displaying cardiac episode history for analyzing efficacy of cardiac therapy. The ISD applies anti-bradycardia therapy in patients who suffer from a slow heart rate, and antitachycardia therapy in patients who experience episodes of high heart rate and/or fibrillation. The ISD detects the occurrence of these episodes, applies the necessary therapy, and stores the chronology of these events in a special memory unit. An external device may be employed to telemetrically retrieve the stored data from the ISD memory unit, and display the data in a time-line fashion for analysis by a physician. The recordation of such data provides a valuable tool for the physician to track cardiac episode history and recommend the appropriate therapy for the patient.
72 Citations
27 Claims
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1. A system, including an implantable cardiac stimulation device, for analyzing efficacy of cardiac stimulation therapy by storing and displaying historical data related to episodes of cardiac stimulation therapy, the system comprising:
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sensing means for sensing a patient'"'"'s cardiac rhythm which changes as a function of time; detection means for detecting a plurality of pathological cardiac rhythms; means for classifying each episode of a cardiac rhythm into one of a plurality of rate zones; stimulation means for delivering cardiac stimulation therapy to a patient'"'"'s heart based on the rate zone of the cardiac rhythm; means for storing data related to each episode of cardiac stimulation therapy as a function of time, the data including information indicative of the cardiac stimulation therapy delivered, the rate zone in which the cardiac rhythm was classified and the time that the cardiac stimulation therapy was delivered; and display means, telemetrically coupled to the storing means, for graphically displaying the data along an x-axis and a y-axis as a function of the time that the cardiac stimulation therapy was delivered; whereby the plurality of rate zones are displayed along the y axis and the time that each episode of cardiac stimulation therapy was delivered is displayed along the x axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system, including an implantable cardiac stimulation device, for analyzing historical data related to applications of cardiac stimulation therapy, the system comprising:
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detection means for detecting a plurality of cardiac rhythms; means for classifying each of the cardiac rhythms into a one of a plurality of pre-defined rate zones based upon the rate of such cardiac rhythm; stimulation means for delivering at least one type of cardiac stimulation therapy to a patient'"'"'s heart based upon the rate zone of the cardiac rhythm; means for storing data related to the cardiac stimulation therapy for each episode of cardiac rhythm as a function of time, the data including information indicative of the cardiac stimulation therapy delivered, the rate zone in which the cardiac rhythm was classified and the time that the cardiac stimulation therapy was delivered; and display means for graphically displaying the data along an x-axis and a y-axis as a function of the time that the cardiac stimulation therapy was delivered; whereby the plurality of rate zones are displayed along the y-axis and the time that each episode of cardiac stimulation therapy was delivered is displayed along the x-axis.
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14. In an implantable cardiac stimulation device, a method of analyzing efficacy of cardiac stimulation therapy, the method comprising the steps of:
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sensing a patient'"'"'s cardiac rhythm as a function of time; detecting a pathological cardiac rhythm upon occurrence; classifying the pathological rhythm into one of a plurality of zones; delivering a cardiac stimulation therapy to the patient'"'"'s heart in response to the detected pathological cardiac rhythm; recording data related to the pathological cardiac rhythm, the stimulation therapy and the time that the stimulation therapy was delivered; and displaying the data for analysis along an x-axis and a y-axis as a function of the time that the cardiac stimulation therapy was delivered; whereby the plurality of rate zones are displayed along the y-axis and the time that each episode of cardiac stimulation therapy was delivered is displayed along the x-axis. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A system for analyzing efficacy of cardiac stimulation during a cardiac episode, the system comprising:
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a first circuit which senses a patient'"'"'s cardiac rhythm as a function of time; a detector which detects a pathological cardiac rhythm upon occurrence; a processor which classifies the pathological cardiac rhythm into one of a plurality of zones; a second circuit which delivers a cardiac stimulation therapy to the patient'"'"'s heart in response to the pathological cardiac rhythm; a memory which stores data related to the pathological cardiac rhythm, the stimulation therapy and the time that the stimulation therapy was delivered; and a display unit, telemetrically coupled to the memory, which displays the data for analysis along an x-axis and a y-axis as a function of the time that the cardiac stimulation therapy was delivered; whereby the plurality of rate zones are displayed along the y-axis and the time that each episode of cardiac stimulation therapy was delivered is displayed along the x-axis. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification