Which statement about defibrillation energy recommendations is most accurate?

Which statement about defibrillation energy recommendations is most accurate?

• A. The initial energy for biphasic devices is typically 360 J
• B. The initial energy for biphasic devices is always 50 J
• C. The energy level is not important as long as a shock is delivered
• D. For biphasic devices, initial energy is typically around 200 J (range 120-200 J) and should follow device guidelines

Answer: (D)

Defibrillation energy settings for biphasic devices are lower than older monophasic machines because the waveform delivers effective shocks more efficiently. Modern biphasic defibrillators commonly require an initial shock around 200 joules, with an acceptable range roughly from 120 to 200 joules. The key point is to follow the specific device guidelines, since different models may have slightly different recommended starting energies. This matters because delivering too low energy may fail to terminate the arrhythmia, while too high energy can increase myocardial injury without improving outcomes. So the statement that initial energy is typically around 200 J (range 120–200 J) and should follow device guidelines best matches current practice for biphasic defibrillators.

Defibrillation energy settings for biphasic devices are lower than older monophasic machines because the waveform delivers effective shocks more efficiently. Modern biphasic defibrillators commonly require an initial shock around 200 joules, with an acceptable range roughly from 120 to 200 joules. The key point is to follow the specific device guidelines, since different models may have slightly different recommended starting energies.

This matters because delivering too low energy may fail to terminate the arrhythmia, while too high energy can increase myocardial injury without improving outcomes. So the statement that initial energy is typically around 200 J (range 120–200 J) and should follow device guidelines best matches current practice for biphasic defibrillators.