Final answer:
The recommended energy dose for biphasic synchronized cardioversion of atrial fibrillation is generally between 120 to 200 Joules, starting lower and increasing if needed. The exact starting energy may vary based on the defibrillator model but is often around 120-150 Joules or 200 Joules for older models.
Step-by-step explanation:
The recommended energy dose for biphasic synchronized cardioversion of atrial fibrillation is typically between 120 to 200 Joules. Biphasic defibrillators use two sequential current pulses in opposite directions. It's important to start at a lower dose and then increase if necessary for subsequent shocks. For most biphasic defibrillators, the initial energy setting of 120-150 Joules is recommended. If the first attempt at cardioversion is unsuccessful, the energy level can be increased. Earlier generation biphasic defibrillators might require starting at 200 Joules. It is always critical to follow the guidelines specific to the defibrillator model being used.
Looking at the provided information, the concept of electrical safety in medical devices is emphasized. For example, question 90 raises concerns about the potential for ventricular fibrillation when low levels of current are applied to the heart, specifically illustrating the importance of controlling the energy delivered. Moreover, question 6 discusses how a defibrillator can have a high-power output without causing serious burns due to the short duration of the shock.