Why the study?
Does hyperthyroidism alter sympathovagal balance as measured by heart rate variability compared to healthy controls?
Does hyperthyroidism alter sympathovagal balance as measured by heart rate variability compared to healthy controls?
Hyperthyroidism is associated with reduced parasympathetic activity and a relative hypersympathetic tone, which normalizes after treatment with methimazole.
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Hyperthyroidism was associated with sympathovagal imbalance on HRV; observational data leaves open clinical relevance and need for prospective validation.
Cacciatori et al. (1996) studied this question.
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