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Paroxysmal supraventricular tachycardia (PSVT) is treated with vagal maneuvers, including the Valsalva maneuver, followed by medication or electrical cardioversion if vagal maneuvers are unsuccessful. Turkish investigators performed a randomized, controlled trial comparing the standard Valsalva maneuver with a previously described modified Valsalva maneuver in 56 patients with PSVT (NEJM JW Emerg Med Oct 2015 and Lancet 2015; 386:1747.)
In the standard...