[Answer] A 3yo unresponsive apneic child is brought to the emergency department. EMS personnel report that the child became unresponsive as they arrived at the hospital. The child is receiving CPR with bag-mask ventilation. The rhythm shown here is on the cardiac monitor. A biphasic manual defibrillator is present. You quickly use the length from head to of the child on a color-coded length-based resuscitation tape to estimate the approximate weight as 15kg. Which therapy is most appropriate for this child at this time?