Why the study?
Does acute moderate alcohol consumption affect respiratory sinus arrhythmia in healthy males?
Does acute moderate alcohol consumption affect respiratory sinus arrhythmia in healthy males?
Acute moderate alcohol consumption alters central nervous system control over respiratory sinus arrhythmia, with effects varying by individual alcohol tolerance.
Acute alcohol may blunt vagal responses to auditory input depending on tolerance; extends RCT evidence on alcohol's acute effects on parasympathetic cardiac regulation.
We investigated the effect of acute moderate alcohol consumption or placebo on respiratory sinus arrhythmia (RSA) in 48 healthy participants with different levels of alcohol tolerance but no abuse. In the electrocardiogram recording, auditory stimuli were presented at defined points in the respiratory cycle, which allows a non-invasive measure of CNS control over RSA. After alcohol consumption we found a decrease in RSA with auditory stimulation. Moreover, individuals with low tolerance showed only a slight change in the RSA after alcohol intake compared to baseline, whereas the placebo drink led to a reduced RSA. In subjects with high alcohol tolerance, alcohol consumption led to a reduction of RSA, with no change after placebo. These results suggest a centrally driven influence on RSA that is changed by alcohol ingestion depending upon subjects' levels of alcohol tolerance.
No takes yet. Share an insight, caveat, or question.
Schulte et al. (2002) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: