On the diagnosis of wide QRS tachycardia.
Class IC antiarrhythmic drugs may be pro-arrhythmic. The diagnosis of the exact nature of the arrhythmia may be challenging. In most case, these drugs should be stopped regardless of the type of the arrhythmia.
['Danon|Asaf|A|']
Wide QRS tachycardia Flecainide Ventricular tachycardia