Acute management of supraventricular tachycardias with and without established diagnosis (termination and/or rate regulation of tachycardia)

Acute management of supraventricular tachycardias without an established diagnosis is first of all always aiming at restoring sinus rhythm—or, in other words, at rhythm control. The management further depends on the QRS width during ongoing tachycardia. If narrow QRS complex tachycardia is present, rhythm control by using medical therapy can be used as the first step, whereas external cardioversion should be the preferred rhythm control strategy in wide QRS complex tachycardia.