Abstract
Background
Duchenne muscular dystrophy (DMD) causes serious health consequences that include impairment of the respiratory system and sleep. The aim of our study is to investigate the sleep architecture and respiratory profile during sleep of symptomatic patients with DMD without ventilatory support.
Methods
We evaluated polysomnography (PSG) of boys with DMD (n = 44) and a control group (n = 79) with sleep complaints that was matched in age but without neuromuscular disease.
Results
DMD patients presented sleep impairments when compared with the control group in terms of decreased sleep efficiency (72.4 ± 1.9 vs 80.3 ± 1.4 %, P = 0.002) and increased apnea-hypopnea index (AHI) during nonrapid eye movement (NREM) sleep (1.6 ± 0.3 vs 0.3 ± 0.2/h, P = 0.003). The main changes were observed during rapid eye movement (REM) sleep: an increase in REM sleep latency (202.2 ± 11.8 vs 152.3 ± 8.6 min, P < 0.001), a reduced percentage of REM sleep (13.1 ± 0.9 vs 17.9 ± 0.7 %, P = 0.001), and exacerbation of AHI (8.7 ± 1.5 vs 1.0 ± 1.1 events/h, P = 0.001). There was an increase in the total number of apneas, especially obstructive apneas (6.8 ± 1.9 vs 0.8 ± 1.3, P = 0.013).
Conclusions
The sleep and respiratory profile during sleep of patients with DMD are compromised. The results suggest that these changes reflect the muscle weakness inherent in DMD and are demonstrated mainly during REM sleep. Thus, the use of PSG is important to identify sleep-disordered breathing at an early stage, before deciding when to introduce noninvasive respiratory support for prevention of respiratory complications.
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Abbreviations
- AHI:
-
Apnea-hypopnea index
- BMI:
-
Body mass index
- DMD:
-
Duchenne muscular dystrophy
- EEG:
-
Electroencephalogram
- NREM:
-
Nonrapid eye movement
- OSAS:
-
Obstructive sleep apnea syndrome
- PSG:
-
Polysomnography
- REM:
-
Rapid eye movement
- SDB:
-
Sleep-disordered breathing
- SpO2 :
-
Oxygen saturation
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Acknowledgments
This work was supported by grants from Associação Fundo de Incentivo a Pesquisa (AFIP), the São Paulo Research Foundation (FAPESP grant #14/08067-0 to KTN), and CNPq. MLA and ST are recipients of the CNPq fellowship.
Conflict of interest
Neither of the authors have any conflict of interest to disclose. We confirm that we have read the Journal’s position on issues involved in ethical publication and affirm that this report is consistent with those guidelines.
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Nozoe, K.T., Moreira, G.A., Tolino, J.R.C. et al. The sleep characteristics in symptomatic patients with Duchenne muscular dystrophy. Sleep Breath 19, 1051–1056 (2015). https://doi.org/10.1007/s11325-014-1103-9
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DOI: https://doi.org/10.1007/s11325-014-1103-9