Which of the following is an example of a shockable rhythm?

Pulseless ventricular tachycardia is classified as a shockable rhythm because it is characterized by an abnormal rapid heart rate that does not effectively pump blood, leading to a state of cardiac arrest. In this situation, the electrical activity of the heart is chaotic, preventing it from maintaining an adequate output. When you deliver a shock, typically using an automated external defibrillator (AED) or manual defibrillator, it can interrupt that disorganized electrical activity, allowing for the possibility of restoring a normal rhythm.

On the other hand, asystole represents a complete absence of electrical activity in the heart and therefore cannot be treated with a shock. Bradycardia involves a slower than normal heart rate but does not inherently mean there's no pulse; shock is not indicated here unless the bradycardia leads to hemodynamic instability. Ventricular fibrillation, while also a shockable rhythm, is not the answer in this case because the question asks specifically for an example, and pulseless ventricular tachycardia is the clear choice given the context.