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Premature Ventricular Complexes (PVC's) - Ventricular Rhythms

Description 1

  • PVC rhythms may occur for a number of different reasons i.e., diet, fatigue, stress, disease, ischemia to name a few.
  • Premature complexes frequently occur in bradycardic rhythms, but may occur almost any time.
  • PVC’s occur when an early electrical impulse occurs from a location in either ventricle.

pvc ecg image 6

Description 2

  • This early impulse causes an early cardiac complex which disrupts the underlying rhythm.
  • The locus of stimulation being different, results in a change in the morphology of the cardiac complex.
  • Note the absence of P wave and the wide, bizarre QRS complex.
  • PVC’s can occur occasionally or frequently.
  • PVC’s can be observed with or without a pattern
pvc on ecg strip 109


nsr with pvc ecg image 110

Analyze this tracing using the five steps of rhythm analysis.

Show Answer
  • Rhythm: Irregular
  • Rate: 60
  • P Wave: upright and uniform, absent on early complex
  • PR interval: 0.16 sec
  • QRS: 0.08 sec, early complex wide and bizarre 0.16 sec
  • Interpretation: Sinus Rhythm (NSR) with PVC

Authors and Sources

Authors and Reviewers


? v:3 | cc: | tar: False | onAr:0 | onPs:2 | tLb:3 | tLbJs:0
| pv: 1 uStat: False | db:0 | shouldInvoke:False | pu:False | em: | refreshTime: 1/1/0001 12:00:00 AM || now: 7/13/2024 7:48:39 PM | firstPage: True
| statusStg: | cDbLookup# 0

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