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Related Experiment Videos

Respiratory-dependent pacing: a dual response from a single sensor.

S C Webb1, L M Lewis, J A Morris-Thurgood

  • 1Royal Postgraduate Medical School, London, UK.

Pacing and Clinical Electrophysiology : PACE
|June 1, 1988
PubMed
Summary

The Biorate RDP3 pacemaker responds to upper limb movement, not just respiration. Its sensitivity to limb motion is greatest when the impedance sensor is on one side of the chest.

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Area of Science:

  • Biomedical Engineering
  • Cardiology
  • Medical Devices

Background:

  • Rate-responsive pacemakers (RRPs) adjust heart rate based on physiological demand.
  • The Biorate RDP3 pacemaker uses an impedance sensing electrode to detect non-respiratory signals.

Purpose of the Study:

  • To evaluate the sensitivity of the Biorate RDP3 pacemaker to non-respiratory signals, specifically upper limb movement.

Main Methods:

  • Ambulatory telemetry was used to study five patients with Biorate RDP3 pacemakers.
  • Patients underwent various activities, including walking with arm movements and voluntary hyperventilation.
  • Pacemaker response was analyzed based on sensor electrode placement (across midline vs. unilateral).

Main Results:

Related Experiment Videos

  • The Biorate RDP3 pacemaker increased pacing rate in response to upper limb movement.
  • Sensitivity to limb movement was greater when the impedance sensor did not cross the midline.
  • The pacemaker showed increased pacing with ipsilateral arm swinging.

Conclusions:

  • The Biorate RDP3 pacemaker effectively responds to non-respiratory signals, including upper limb movement.
  • Sensor placement significantly influences the pacemaker's sensitivity to limb movement.
  • This suggests potential for enhanced physiological pacing with optimized sensor positioning.