MEDEST - December 17, 2014 - By Ken Grauer
- "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 focus outside of the conduction system. As a result VT is more likely to be wider and far less organized (therefore “uglier”) in its conduction pattern"
http://medest118.com/2014/12/17/the-3-simple-rules-an-easy-and-accurate-tool-for-recognizing-vt/