For what condition is Lidocaine specifically indicated?

Lidocaine is specifically indicated for the treatment of stable polymorphic ventricular tachycardia (VT), particularly in the setting of acute ventricular ectopy or ischemic heart disease. This antiarrhythmic medication works primarily by blocking sodium channels, which helps to stabilize the cardiac cell membrane and decreases the heart's electrical excitability.

In the case of stable polymorphic VT, which can be associated with conditions like torsades de pointes, quick intervention with antiarrhythmic agents such as lidocaine is crucial to restore normal cardiac rhythm and prevent the progression to more severe arrhythmias or sudden cardiac arrest.

Other conditions listed do not specifically indicate the use of lidocaine. For example, stable atrial fibrillation generally requires different treatment approaches, such as rate control or anticoagulation, rather than sodium channel blockers. Post-surgical hypotension typically requires fluid resuscitation or vasopressor support, while pulmonary edema is often managed with diuretics and oxygen therapy rather than antiarrhythmic drugs like lidocaine.