Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1994-06-07
1996-05-07
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
A61N 136
Patent
active
055141625
ABSTRACT:
A rate-responsive pacemaker measures a patient's level of activity and stores the results in an activity level histogram. The patient's average level of activity is maintained as a running average. Based on a prescribed base pacing rate, a prescribed maximum pacing rate, the average level of activity, and the measured levels of activity stored in the activity level histogram, the rate-responsive pacemaker automatically calculates the slope of the pacemaker transfer function. An activity deviation histogram is also maintained. Analysis of the activity deviation histogram allows the pacemaker to determine if the patient was usually inactive for an extended period of time, and to inhibit an automatic slope calculation under such conditions. If a patient desires to reach a prescribed target heart rate during exercise, the slope may be calculated using the target heart rate and a prescribed fraction of time each week that the patient devotes to exercise.
REFERENCES:
patent: 4940052 (1990-07-01), Mann et al.
patent: 5074302 (1991-12-01), Poore et al.
patent: 5292341 (1994-03-01), Snell
Arambula Elia R.
Bornzin Gene A.
Florio Joseph J.
Jastrzab Jeffrey R.
Kamm William E.
Pacesetter Inc.
Weinberg Lisa P.
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