Does Obstructive Sleep Apnea-Hypopnea Syndrome severity affect Heart Rate Variability and QTc Interval in hypertensive patients?
In hypertensive patients with OSAHS, nocturnal hypoxemia is associated with impaired heart rate variability, whereas QTc prolongation is driven by other comorbidities rather than sleep apnea severity.
: Hypertensive patients with OSAHS have a high cardiovascular risk burden and frequent autonomic dysfunction. Nocturnal hypoxemia is independently associated with impaired HRV, reflecting sympathetic predominance. QTc prolongation appears to be influenced by additional comorbidities rather than OSAHS severity alone.
Stojanović et al. (Tue,) studied this question.