PREMATURE JUNCTIONAL CONTRACTIONS
 
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  • Basic R-R interval is regular, but interrupted intermittently
  • Irregular R-R interval is short (premature QRS)
  • QRS duration of early complex is normal
  • QRS morphology of early complex is similar to regular QRS
  • Early QRS is not preceded by a P wave
  • If QRS morphology of the early complex is not similar to the regular QRS and there is no preceding P wave, the diagnosis is premature ventricular contraction

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  • Premature atrial contraction
  • Prematuure ventricular contraction
  • Wandering atrial pacemaker