common cardiac pacing modes

  • related: cardiac pacer
  • tags: #permanent

VVI

  • ventricular sensing, ventricular pacing, ventricular inhibited
  • paces ventricle if no QRS sensed
  • safest mode, ensures minimum vent rate

AAI

  • atrial sensing, atrial pacing, atrial inhibited
  • maintains AV synchrony
  • bad if AV node dysfunction
  • do not use with mitral valve ring surgery, AV block, afib

DDO

  • dual sense, dual pacing, obligatory pacing
  • OR operation only
  • ignores underlying rhythm
  • any bovie can have false positive P QRS interpretation

DDD

  • dual sensing, dual pacing, inhibited by any intrinsic activity
  • triggers ventricular lead when P wave sensed or paced

DVI

  • dual paced, ventricular sensed
  • senses QRS, if there is none, then paces both atrial and ventricle
  • great when p waves are very small and can't be sensed