The Valsalva maneuver in Chagas disease patients without cardiopathy

Abstract

To perform a meta-analysis of studies using the Valsalva ratio (VR) in Chagas disease (ChD) patients without cardiopathy in comparison to control subjects in order to determine if vagal heart modulation is impaired in early forms of ChD. The medical literature was systematically searched and reviewed for cross-sectional studies in humans in which the… (More)
DOI: 10.1007/s10286-009-0044-z

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