common cardiac pacing modes

  • related: cardiac pacer
  • tags: #permanent

AAI

  • atrial sensing, atrial pacing, atrial inhibited
  • doesn’t know what V is doing
  • In order for it to work needs wire on A and AV node to work
  • maintains AV synchrony
  • bad if AV node dysfunction
  • do not use with mitral valve ring surgery, AV block, afib

VVI

  • ventricular sensing, ventricular pacing, ventricular inhibited
  • paces ventricle if no QRS sensed
  • Doesn’t know what’s going on in A
  • Great as backup for people in atrial fib who came out and gets bradycardic. Let’s the heart be in afib and then paces the V when in brady
  • safest mode, ensures minimum vent rate

DDD

  • dual sensing, dual pacing, inhibited by any intrinsic activity
  • triggers ventricular lead when P wave sensed or paced
  • Best hemodynamic pacing mode. When A speeds up, V speeds up as well.
  • Maintains AV synchrony.

DVI

DDO

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

Magnet mode