Shock as quickly as possible and resume CPR immediately
First shock 2 J/kg
Second shock 4 J/kg
Subsequent shocks ≥ 4 J/kg (max 10 J/kg)
Give Epi if (shock + 2min CPR) fails to convert rhythm
Perform pulse check/shock if appropriate q2min
Give antiarrhythmic if (2nd shock + 2min CPR) again fails
1st line: Amiodarone
5mg/kg (max 300mg)
May repeat twice up to 15mg/kg
2nd line: Lidocaine
1mg/kg
Magnesium
25-50mg/kg (max 2g) IV
Only for polymorphic V-tach
First shock 2 J/kg
Second shock 4 J/kg
Subsequent shocks ≥ 4 J/kg (max 10 J/kg)
1st line: Amiodarone
5mg/kg (max 300mg)
May repeat twice up to 15mg/kg
2nd line: Lidocaine
1mg/kg
Magnesium
25-50mg/kg (max 2g) IV
Only for polymorphic V-tach
5mg/kg (max 300mg)
May repeat twice up to 15mg/kg
1mg/kg
25-50mg/kg (max 2g) IV
Only for polymorphic V-tach
Pulseless arrest 
Spinal shock
Heat syncope
Cardiogenic shock
Electrical storm
Neurogenic shock
Hemorrhagic shock
Undifferentiated shock 