For paroxysmal supraventricular tachycardia, what is the recommended Joules for synchronized cardioversion?

For paroxysmal supraventricular tachycardia (PSVT), the recommended energy level for synchronized cardioversion is typically set at 50 Joules. This level of energy is effective in restoring normal sinus rhythm while minimizing the risk of damaging the myocardium. Synchronized cardioversion is used specifically for tachyarrhythmias where the patient may be symptomatic, and a lower initial energy level is often sufficient for this type of rhythm.

If the initial attempt at 50 Joules is unsuccessful, higher energy levels, such as 100 Joules, may be used in subsequent attempts. However, starting at 50 Joules strikes a balance between effectiveness and safety for treating PSVT.