Ventricular tachycardia is a common cardiac arrhythmia. The significance of which can be very dangerous to relatively benign depending upon the etiology and underlying heart disease . The ECG during VT is rarely useful to identify the etiology .Often times ECG after reversal will throw more light .
What are the ECG clues one should look for once VT is reverted ?
- Any evidence for old MI
- Low voltage QRS/ LBBB/RBBB may indicate DCM
- LVH -HOCM features
- VPDs – Multiple , LBBB morphology / suggest RVOT VT
- QRS slur or notching indicating scars
- Epsilon waves indicate ARVD
- RBBB pattern would suggest Brugada
- Prolonged QT interval
- Tall T waves/ U waves / Inverted T -and other electrolytic abnormality.
- Delta waves would indicate anti-dromic tachycardia.
Dr.S.Venkatesan MD 
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