Abstract:Background and Objectives:The head-up tilt test (HUT) is widely used for the diagnosis of vasovagal syncope.To improve the sensitivity of the test, provocation with isoproterenol is frequently used. The aim of this study was to evaluate the values of isosorbide dinitrate spray as a provocation drug in the HUT. Subjects and Methods: Two hundred patients, undergoing baseline HUT (60°for 20 minutes) for suspected vasovagal syncope or presyncope and unexplained dizziness, were enrolled. If the baseline HUT was neg… Show more
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