Final answer:
During an inter-cycle pause in BLS, a shockable rhythm is diagnosed. Defibrillation is used to establish a normal sinus rhythm and can be performed using external automated defibrillators (EADs) placed in public areas.
Step-by-step explanation:
During an inter-cycle pause in basic life support (BLS), a shockable rhythm is diagnosed. A shockable rhythm refers to abnormal heart rhythms, such as ventricular fibrillation, that can be interrupted with a cardiac defibrillator. When the heart is in a shockable rhythm, it beats in a wild and uncontrolled manner, preventing effective pumping of blood. Defibrillation uses special paddles to apply an electrical charge to the heart, aiming to establish a normal sinus rhythm. External automated defibrillators (EADs) are being placed in public areas to help save lives.