Premature ventricular contraction EKG examples

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Mugilan Poongkunran M.B.B.S [2]

Lown and Graboys proposed the grading system for premature ventricular contraction which is used for prognostic purposes.

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1. Called frequent if there are 5 or more PVCs per minute on the routine ECG
2. Lown and Graboys proposed the following grading system which is used for prognostic purposes:
   • Grade 0 = No PVCs
   • Grade 1 = Occasional (<30 per hour)
   • Grade 2 = Frequent (>30 per hour)
   • Grade 3 = Multiform
   • Grade 4 = Repetitive

     1. A = Couplets
     2. B = Salvos of > 3

   • Grade 5 = R-on-T

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