What is the synchronized cardioversion energy setting for SVT or atrial flutter in biphasic mode?

The correct energy setting for synchronized cardioversion of supraventricular tachycardia (SVT) or atrial flutter in biphasic mode generally falls within the range of 50-100 joules. This recommendation is based on clinical evidence suggesting that this energy level is effective for terminating these types of arrhythmias while minimizing potential harm and maximizing patient safety.

In biphasic cardioversion, the shock is delivered in two phases, which can be more effective than monophasic shock at lower energy levels. Starting at 50 joules and potentially escalating to 100 joules as needed allows for effective rhythm correction while preserving cardiac function. This approach is well established in guidelines and supported by clinical best practices, which emphasize starting at lower energy levels for more specific rhythms like SVT and atrial flutter.

The other energy settings provided in the choices, while applicable in certain situations, particularly for other arrhythmias or in monophasic mode, are higher than necessary for the conditions specified in the question and could lead to unnecessary complications or myocardial injury if used for SVT or atrial flutter.