Tachcardia + wide QRS (diff from a specific SVT called wide QRS SVT, however better to consider and treat as VT until proven otherwise)
Causes include electrolyte abnormalities, MI, drugs, long QT syndrome etc
Tmt: Immediate cardioversion-
If stable: Chemical (Amiodarone , Lidocaine) or Sync DC cardioversion
If unstable: has pulse- Synchronised DC cardioversion
no pulse - defibrillation
Torsades de pointes :
is a different type of VT. The morphology of QRS varies from one complex to the other thus it's refered to as polymorphic VT.
Caused by anything that can prolong QT interval. culprits include Quinidine, Procainamide, Sotalol, Amiodarone (least likely) etc
Tmt includes Magnesium sulphate infusion first!