Witnessed cardiac arrest while on a monitor - up to three successive shocks before CPR The 2015 ALS quidelines endorse three quick successive (stacked) shocks in cases of monitored and witnessed cardiac arrest (if VF/ pVT). Chest compressions at a rate of 30:2 would be correct in cases of cardiac arrest that are not witnessed and monitored, or in PEA/asystole. Amiodarone 300mg is administered after the third shock (in shockable rhythms). Pass medicine cardiology 312 viewsمُحَمَّدْ تَقِي اللُّعَيْبِي, edited 15:22