Critical Care Abnormal Cardiac Functioning 1 Practice Exam

When ventricular fibrillation (vfib) is confirmed, the immediate priority is to prepare for defibrillation. In vfib, the heart's electrical activity is chaotic, preventing it from effectively pumping blood. Defibrillation is necessary to reset the heart's rhythm and allow it to re-establish a normal heartbeat. This high-energy shock can restore a coordinated electrical activity in the myocardium, which is essential for effective circulation.

While initiating CPR is also critical in the management of vfib, the preparation for defibrillation takes precedence because timely defibrillation can save a life by addressing the underlying cause of cardiac arrest more directly than CPR at that moment. Administering oxygen and checking the pulse are also important aspects of care, but they come after the immediate action of defibrillation preparation since restoring a normal rhythm is vital to achieving an effective cardiac output.