What energy is used to cardiovert Narrow Irregular rhythms (AFIB, MAT)?

What energy is used to cardiovert Narrow Irregular rhythms (AFIB, MAT)?

• A. 100 J
• B. 200 J
• C. 300 J
• D. 400 J

Answer: (B)

Synchronized cardioversion for irregular narrow rhythms aims to reset the atrial electrical activity without provoking dangerous ventricular arrhythmias. The standard starting energy for this task is about 200 joules. That level strikes a balance: it’s strong enough to cardiovert atrial fibrillation (and similar irregular atrial rhythms) reliably, yet not so high as to unnecessarily risk ventricular injury. If 200 J doesn’t convert the rhythm, you can escalate to higher energies (commonly 300 J, then 360 J depending on the device and patient response). Using a lower energy like 100 J is usually insufficient for reliable cardioversion, and higher energies are reserved for subsequent attempts or specific device types. In this context, 200 joules is the typical initial choice for cardioverting these irregular, narrow rhythms.

Synchronized cardioversion for irregular narrow rhythms aims to reset the atrial electrical activity without provoking dangerous ventricular arrhythmias. The standard starting energy for this task is about 200 joules. That level strikes a balance: it’s strong enough to cardiovert atrial fibrillation (and similar irregular atrial rhythms) reliably, yet not so high as to unnecessarily risk ventricular injury. If 200 J doesn’t convert the rhythm, you can escalate to higher energies (commonly 300 J, then 360 J depending on the device and patient response). Using a lower energy like 100 J is usually insufficient for reliable cardioversion, and higher energies are reserved for subsequent attempts or specific device types. In this context, 200 joules is the typical initial choice for cardioverting these irregular, narrow rhythms.