Journal article

Vagal response varies with Valsalva maneuver technique: A repeated-measures clinical trial in healthy subjects

LF Wong, DM Taylor, M Bailey

ANNALS OF EMERGENCY MEDICINE | MOSBY-ELSEVIER | Published : 2004

Abstract

STUDY OBJECTIVE: Variable success rates of the Valsalva maneuver in treatment of paroxysmal supraventricular tachycardia may be due to variations in performance technique. This study aimed to compare the magnitude of the vagal reflexes initiated by 5 variations of the Valsalva maneuver technique (supine, supine with epigastric pressure, supine with leg raise, semirecumbent position, and sitting position). METHODS: This was a single-blinded, repeated-measures, clinical trial of 65 subjects in sinus rhythm. Subjects performed each Valsalva maneuver technique 5 times in random order. The means of the longest ECG R-R intervals during the relaxation phase (postmaneuver R-R interval) and the postm..

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University of Melbourne Researchers