The following article describes management of the cardiac arrest victim according to rhythm.

Ventricular fibrillation (VF) is the most common initial heart rhythm in patients with out-of-hospital cardiac arrest (OHCA), and the most salvageable one. Although VF appears as a chaotic and disorganized rhythm, characteristics of the ventricular fibrillation waveform such as amplitude, frequency, and organization can be systematically quantified in real-time.

According to television, if there’s a heart problem, you shock it. WRONG! Learn about shockable rhythms.