In 109 participants with sleep-disordered breathing and paroxysmal atrial fibrillation, CPAP therapy altered diurnal heart rate variability at 3 months, increasing MNN and decreasing SDNN.
Cohort (n=109)
Does CPAP therapy alter diurnal variation of heart rate variability in patients with paroxysmal atrial fibrillation and sleep-disordered breathing?
CPAP therapy alters diurnal autonomic measures in patients with sleep-disordered breathing and paroxysmal atrial fibrillation, with more pronounced associations during wakefulness.
ABSTRACT Objective Autonomic nervous system (ANS) dysfunction is implicated in sleep‐disordered breathing (SDB) and atrial fibrillation (AF); however, diurnal patterning of ANS function in SDB is unclear. We hypothesize diurnal variation of heart rate variability (HRV) in paroxysmal AF (PAF) in SDB and alteration by continuous positive airway pressure (CPAP). Method Data from the Sleep Apnea and Atrial Fibrillation Biomarkers and Electrophysiologic Atrial Triggers (SAFEBEAT) study including 7–24 days of electrocardiography (ECG), concomitant actigraphy and polysomnography at baseline and 3 months post‐CPAP initiation were analyzed. Linear mixed‐effects models were used to assess (1) SDB: apnea hypopnea index (AHI), hypoxia (%sleep time with SaO 2 < 90% and nadir SaO 2 ) and (2) diurnal average HRV in 2 domains: frequency domain ( sympathovagal ) with low‐frequency (LF) power (LFP), high‐frequency (HF) power (HFP), LF/HF ratio (LHR), and time domain with mean of normal R‐R interval (MNN), standard deviation of NN intervals (SDNN), Poincare plot standard deviation short‐term and long‐term variability (SD1, SD2) and effect of CPAP. All results were adjusted for age, sex, race, BMI, and use of antihypertensive, antiarrhythmic, and atrioventricular nodal blockade medications. Results In 44 869 5‐min epochs from 109 participants with SDB and PAF, associations of AHI and LFP, nadir SaO 2 with sympathovagal measures (LFP, LHR) and time domain measures (SDNN, SD2) were observed during wakefulness. Sleep–wake interactions were observed for multiple HRV measures, with associations generally more evident during wakefulness. From baseline to follow‐up after CPAP, wakefulness HRV measures showed an increase in MNN and decreases in SDNN, RMSSD, CV, SD1, and SD2. During sleep, MNN, SD2, and LHR increased. Conclusions Autonomic measures exhibited diurnal variation in moderate–severe SDB and were influenced by CPAP. Association with SDB severity was more pronounced during wakefulness, providing key insights into likelihood of sustained chronobiologic electrophysiological remodeling.
Khazaie et al. (Mon,) conducted a cohort in Sleep-disordered breathing and paroxysmal atrial fibrillation (n=109). CPAP therapy vs. Baseline (pre-CPAP) was evaluated on Diurnal average heart rate variability (HRV) in frequency and time domains. In 109 participants with sleep-disordered breathing and paroxysmal atrial fibrillation, CPAP therapy altered diurnal heart rate variability at 3 months, increasing MNN and decreasing SDNN.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: