Article Text


Wenckebach phenomenon in the exit area from a transvenous pacing electrode.
  1. T Peter,
  2. R Harper,
  3. D Hunt,
  4. G Sloman


    An unusual type of exist block from a transvenous pacing electrode was recorded in a 63-year-old man with an acute inferior infarct and cardiogenic shock. The pacemaker artefact to QRS interval increased gradually till there was loss of capture. A gradual change from I:I pacing rhythm to 4:3 and 3:2 Wenckebach cycles was recorded. This was followed by a fixed 2:I pacemaker artefact to QRS block.

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