What waveform type is used in the defibrillators?

What waveform type is used in the defibrillators?

• A. Monophasic
• B. Truncated
• C. Biphasic
• D. Rectified

Answer: (B)

Modern external defibrillators use a biphasic waveform, delivering the shock in two opposite directions within one event. This two-phase approach is more effective at restoring rhythm while requiring lower energy, which lowers damage to the heart muscle compared with older single-direction shocks. In many devices, this biphasic form is described as a truncated exponential waveform, where the second phase is limited in duration to optimize safety and efficacy. So, the essential type is biphasic, with the truncated exponential shape being a common implementation of that biphasic idea. Monophasic defibrillation is older and generally less favorable due to higher energy needs and greater myocardial injury; terms like rectified describe different or less common waveform implementations and don’t define the standard practice.

Modern external defibrillators use a biphasic waveform, delivering the shock in two opposite directions within one event. This two-phase approach is more effective at restoring rhythm while requiring lower energy, which lowers damage to the heart muscle compared with older single-direction shocks. In many devices, this biphasic form is described as a truncated exponential waveform, where the second phase is limited in duration to optimize safety and efficacy. So, the essential type is biphasic, with the truncated exponential shape being a common implementation of that biphasic idea. Monophasic defibrillation is older and generally less favorable due to higher energy needs and greater myocardial injury; terms like rectified describe different or less common waveform implementations and don’t define the standard practice.