Why the study?
Does superimposed head-down tilt and deep breathing elicit extreme respiratory sinus arrhythmia in a healthy individual?
Population
Healthy 26-year-old woman (n=1)
Comparison
Simultaneous cardiac loading stressors of 45°… vs Baseline breathing in supine and 45° HDT…
Design
Case_report
Authors
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Combined HDT-rebreathing may elicit extreme RSA; case report leaves mechanistic and clinical relevance open pending controlled studies.
Does superimposed head-down tilt and deep breathing elicit extreme respiratory sinus arrhythmia in a healthy individual?
Superimposed orthostatic stress and augmented tidal volumes can synergistically elicit extreme respiratory sinus arrhythmia in healthy individuals.
Baden et al. (2014) studied this question.
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