The “3 SIMPLE Rules”: an easy and accurate tool for recognizing VT


Following the discussion on ectopy and aberrancy (view Ectopy or aberrancy? Google Ecg+ community comments on a clinical case.)  Ken Grauer, EKG master and author of many EKG books, gave us the permission to share his “3 SIMPLE Rules” to recognize VT in a simple ad accurate way.
  • Rule #1 Is there extreme axis deviation during WCT

Extreme axis deviation is easy to recognize. The QRS complex will be entirely negative in either lead I or lead aVF. The presence of extreme axis deviation during a WCT rhythm is virtually diagnostic of VT.
  • Rule #2 Is lead V6 all (or almost all) negative?

IF ever the QRS in lead V6 is either all negative (or almost all negative)  then VT is highly likely.
  • Rule #3 Is the QRS during WCT “ugly”?

The “uglier” the QRS the more likely the rhythm is. VT originates from a ventricular…

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