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Numbering Aberrant Rhythms




These descriptors can increase depending on the number of beats involved in the abnormal system. If every other beat is abnormal, you can describe it as bigeminal. If every third beat is aberrant, it is trigeminal; every fourth would be quadrigeminal. Typically, if every fifth or more beat is abnormal, the aberrant beat would be termed occasional.

Bigeminy is contrasted with couplets, which are paired abnormal beats. If these concurrent beats number three, they are called '''triplets''' and are considered as a brief run of ''non-sustained Ventricular Tachycardia '' or NS-VT.

PVC's are not the only aberrant beat that makes use of these adjectives; others are Premature Atrial Contractions , Parasystole , and Escape Complex es.


EXAMPLES

  • Bigeminal premature ventricular contractions = Normal, PVC, Normal, PVC...

  • Trigeminal premature atrial contractions = Normal, Normal, PAC, Normal, Normal, PAC...

  • Quadrageminal premature ventricular contractions = Normal, Normal, Normal, PVC; Normal, Normal, Normal, PVC...

  • Occasional escape complexes: Normal, Normal, Normal, Normal, Pause, Escape...


  • Bigeminal Couplets: Normal, Normal, PVC, PVC, Normal, Normal, PVC, PVC...

  • NS-VT: Normal, Normal, PVC, PVC, PVC, PVC, Normal, Normal, PVC...