Neurovascular changes associated with the water drinking test

Gustavo Gameiro, Pedro Monsalve, Iuri Golubev, Lori Ventura, Vittorio Porciatti

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Purpose:The water drinking test (WDT) is currently used to temporarily elevate intraocular pressure (IOP) and predict peak IOP in glaucoma. This study investigates neurovascular changes associated with WDT in normal subjects. Methods:The effect of WDT (1 L in 5 min) on IOP, mean brachial blood pressure, heart rate, and pattern electroretinogram was assessed within the next hour in 16 healthy subjects (mean age: 33.5±7.9 y). As a control, testing was repeated in the same subjects without WDT 1 week later.Results:Compared with control, WDT resulted in significant peak changes of the following parameters compared with baseline: IOP: +1.7±1.8 mm Hg after 30′, mean brachial blood pressure: +3.9±6.3 mm Hg after 15′; heart rate: -9.2±9.8 bpm after 15′, pattern electroretinogram latency: +2.1±0.9 ms after 15′.Conclusions:In addition to IOP elevation, WDT was associated with significant changes of hemodynamic parameters and retinal ganglion cell function in young healthy subjects. As these represent risk factors for glaucoma, their assessment upon WDT might increase its predictive power for glaucoma development.

Original languageEnglish (US)
Pages (from-to)429-432
Number of pages4
JournalJournal of Glaucoma
Volume27
Issue number5
DOIs
StatePublished - Jan 1 2018

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Keywords

  • Intraocular pressure
  • Pattern electroretinogram
  • Retinal ganglion cell function
  • Systemic blood pressure
  • Water drinking

ASJC Scopus subject areas

  • Ophthalmology

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