Which of the following is NOT an indication for Lidocaine?

Lidocaine is primarily indicated for the treatment of certain types of arrhythmias, particularly ventricular arrhythmias. Among the options presented, atrial flutter is not treated with lidocaine because this drug specifically works on the ventricular tissues and does not effectively manage atrial arrhythmias. Atrial flutter is typically handled with different classes of antiarrhythmic agents or cardioversion.

In contrast, lidocaine is indicated for ventricular fibrillation (V Fib), which requires immediate stabilization, and is effective in treating ventricular tachycardia (V Tach) when the ventricular tachycardia is symptomatic or life-threatening. Additionally, while head injury patients do receive specific medical attention, the use of lidocaine in this population is not a standard indication for treatment related to arrhythmias.

Therefore, the choice of atrial flutter stands out as the condition for which lidocaine is not recommended.