Key result
Down's syndrome is linked to increased sympathetic and decreased vagal activity during apnea-free sleep.
Why the study?
Does Down's syndrome affect heart rate variability during sleep compared to normal controls?
Case-Control (n=13)
Does Down's syndrome affect heart rate variability during sleep compared to normal controls?
Patients with Down's syndrome exhibit autonomic dysfunction during sleep, characterized by increased sympathetic and decreased vagal activity, which is further exacerbated by sleep apnea.
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May reflect heightened cardiovascular vulnerability in Down syndrome; hypothesis-generating and requires prospective validation before clinical adoption.
Ferri et al. (1998) conducted a case-control in Down's syndrome (n=13). Down's syndrome vs. Normal controls was evaluated on Heart rate variability (HRV) during sleep. Down's syndrome was associated with increased sympathetic function and decreased vagal activity during apnea-free sleep compared to normal controls.
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