Rate responsiveness / adaptive-rate pacing

In Rate Responsive pacing (modes ending with “R”), sensor(s) in pacemaker are used to detect changes in physiologic needs and increase the pacing rate accordingly

The sensor:

  • Sensors are used to detect changes in metabolic demand
  • Sensors sense motion (piezoelectric crystal or accelerometer) or use a physiologic indicator, e.g., minute ventilation

The algorithm:

  • Within the software of the pacemaker
  • Uses the input from the sensor to determine the appropriate paced heart rate for the activity

Common Modes:

  • AAIR
  • VVIR
  • DDDR
  • DDIR
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