A 65-year-old man is brought to the ED with chest pain. As he is transferred to the ED stretcher he loses consciousness. Monitors show VF and there is no pulse palpated. CPR is initiated and pads are placed. Defibrillation is ineffective after two shocks. You ask the team to switch to dual sequential external defibrillation. What is the rationale behind effect of DSED in this patient?