Fig 3.

A, The CALS re-opening kit. B, The six key roles during a cardiac arrest following cardiac surgery. Person 1: should perform external cardiac compressions at a rate of 100–120 beats min⁻¹ whilst ensuring adequacy of compression depth by observing the arterial pressure. Person 2: should ensure adequate oxygen delivery, airway patency, ventilation, and exclusion of respiratory causes of arrest. Person 3: This person should connect the defibrillator, defibrillate as appropriate, and manage pacing as required. They are also responsible for internal defibrillation availability as required. Person 4: is the team leader. This person (often a senior clinician) coordinates the arrest process and ensures that the protocol is followed and resternotomy is anticipated and prepared for. Person 5: This individual stops all infusions after initial resuscitation and administers drugs and infusions as per direction from Person 4. Person 6: This role is coordination and is usually performed by a senior CICU nurse. This individual coordinates all peripheral activity as soon as the situation arises and ensures all equipment is ready and appropriate help is sought.