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The Valsalva maneuver is recommended first-line treatment for stable patients with supraventricular tachycardia, although it is successful in only a minority of patients. These authors tested whether a modified Valsalva maneuver can improve cardioversion rates.
In a randomized, controlled trial, 433 patients who presented to 10 U.K. emergency departments (EDs) with supraventricular tachycardia (not including atrial fibrillation or flutter) performed a standard Valsalva maneuver (15-second, 40-mm Hg strain while in a...