[EKG] VT versus Abberancy

Favor VT:
1. Uniform QRS-polarity from V1~V6 統一QRS的axis是Positive或Negative 

2. Capture beat 一堆wide QRS中有narrow QRS

3. Fusion beat   一堆wide QRS中有"中等寬度" QRS

4. AV-dissociation   一堆wide QRS中有occasional P wave