Pacemaker with patient effort-controlled frequency

Details Pacemaker with patient effort-controlled frequency Pacemaker with patient effort-controlled frequency

1992-12-22

1994-07-19

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 1365

Patent

active

053305108

ABSTRACT:
A pacemaker with patient effort-controlled stimulation frequency that responds to a control parameter. Accelerometers (1) with capacity variation are placed on a substratum. Each of the accelerometers is sensitive in one direction of a Cartesian coordinate system. The output of the accelerometers are combined and integrated over a small time constant to produce a signal representative of the patient's metabolic power exerted. The signal is then used to control the stimulation frequency of the pacemaker. The integration may be based on the sum of the absolute value of the acceleration signals or the square root of the sum of the squares of the acceleration signals.

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Anderson, Kenneth M., "Research Leads To Major Breakthrough In Rate-Responsive Pacemaking", Sensor Pacing Oct. 1986, pp. 89-93.
Anderson, Kenneth, "An Activity Sensor To Control Heart Rate", Implatable Sensors For Closed-Loop Prosthetic Systems, Mt. Kisco, N.Y., Futura Publishing, Inc., 1985 pp. 243-250.

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