Complex sleep apnea syndrome

Is it a unique clinical syndrome?

Timothy Ian Morgenthaler, Vadim Kagramanov, Viktor Hanak, Paul A. Decker

Research output: Contribution to journalArticle

209 Citations (Scopus)

Abstract

Study Objectives: Some patients with apparent obstructive sleep apnea hypopnea syndrome (OSAHS) have elimination of obstructive events but emergence of problematic central apneas or Cheyne-Stokes breathing pattern. Patients with this sleep-disordered breathing problem, which for the sake of study we call the "complex sleep apnea syndrome," are not well characterized. We sought to determine the prevalence of complex sleep apnea syndrome and hypothesized that the clinical characteristics of patients with complex sleep apnea syndrome would more nearly resemble those of patients with central sleep apnea syndrome (CSA) than with those of patients with OSAHS. Design: Retrospective review Setting: Sleep disorders center. Patients or Participants: Two hundred twenty-three adults consecutively referred over 1 month plus 20 consecutive patients diagnosed with CSA. Interventions: NA. Measurements and Results: Prevalence of complex sleep apnea syndrome, OSAHS, and CSA in the 1-month sample was 15%, 84%, and 0.4%, respectively. Patients with complex sleep apnea syndrome differed in gender from patients with OSAHS (81% vs 60% men, p < .05) but were otherwise similar in sleep and cardiovascular history. Patients with complex sleep apnea syndrome had fewer maintenance-insomnia complaints (32% vs 79%; p < .05) than patients with CSA but were otherwise not significantly different clinically. Diagnostic apnea-hypopnea index for patients with complex sleep apnea syndrome, OSAHS, and CSA was 32.3 ± 26.8, 20.6 ± 23.7, and 38.3 ± 36.2, respectively (p = .005). Continuous positive airway pressure suppressed obstructive breathing, but residual apnea-hypopnea index, mostly from central apneas, remained high in patients with complex sleep apnea syndrome and CSA (21.7 ± 18.6 in complex sleep apnea syndrome, 32.9 ± 30.8 in CSA vs 2.14 ± 3.14 in OSAHS; p < .001). Conclusions: Patients with complex sleep apnea syndrome are mostly similar to those with OSAHS until one applies continuous positive airway pressure. They are left with very disrupted breathing and sleep on continuous positive airway pressure. Clinical risk factors don't predict the emergence of complex sleep apnea syndrome, and best treatment is not known.

Original languageEnglish (US)
Pages (from-to)1203-1209
Number of pages7
JournalSleep
Volume29
Issue number9
StatePublished - Sep 1 2006

Fingerprint

Sleep Apnea Syndromes
Obstructive Sleep Apnea
Central Sleep Apnea
Continuous Positive Airway Pressure
Respiration
Apnea
Sleep
Sleep Initiation and Maintenance Disorders

Keywords

  • Sleep apnea, mixed central and obstructive
  • Sleep hypopnea
  • Sleep-disordered breathing

ASJC Scopus subject areas

  • Physiology

Cite this

Morgenthaler, T. I., Kagramanov, V., Hanak, V., & Decker, P. A. (2006). Complex sleep apnea syndrome: Is it a unique clinical syndrome? Sleep, 29(9), 1203-1209.

Complex sleep apnea syndrome : Is it a unique clinical syndrome? / Morgenthaler, Timothy Ian; Kagramanov, Vadim; Hanak, Viktor; Decker, Paul A.

In: Sleep, Vol. 29, No. 9, 01.09.2006, p. 1203-1209.

Research output: Contribution to journalArticle

Morgenthaler, TI, Kagramanov, V, Hanak, V & Decker, PA 2006, 'Complex sleep apnea syndrome: Is it a unique clinical syndrome?', Sleep, vol. 29, no. 9, pp. 1203-1209.
Morgenthaler TI, Kagramanov V, Hanak V, Decker PA. Complex sleep apnea syndrome: Is it a unique clinical syndrome? Sleep. 2006 Sep 1;29(9):1203-1209.
Morgenthaler, Timothy Ian ; Kagramanov, Vadim ; Hanak, Viktor ; Decker, Paul A. / Complex sleep apnea syndrome : Is it a unique clinical syndrome?. In: Sleep. 2006 ; Vol. 29, No. 9. pp. 1203-1209.
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abstract = "Study Objectives: Some patients with apparent obstructive sleep apnea hypopnea syndrome (OSAHS) have elimination of obstructive events but emergence of problematic central apneas or Cheyne-Stokes breathing pattern. Patients with this sleep-disordered breathing problem, which for the sake of study we call the {"}complex sleep apnea syndrome,{"} are not well characterized. We sought to determine the prevalence of complex sleep apnea syndrome and hypothesized that the clinical characteristics of patients with complex sleep apnea syndrome would more nearly resemble those of patients with central sleep apnea syndrome (CSA) than with those of patients with OSAHS. Design: Retrospective review Setting: Sleep disorders center. Patients or Participants: Two hundred twenty-three adults consecutively referred over 1 month plus 20 consecutive patients diagnosed with CSA. Interventions: NA. Measurements and Results: Prevalence of complex sleep apnea syndrome, OSAHS, and CSA in the 1-month sample was 15{\%}, 84{\%}, and 0.4{\%}, respectively. Patients with complex sleep apnea syndrome differed in gender from patients with OSAHS (81{\%} vs 60{\%} men, p < .05) but were otherwise similar in sleep and cardiovascular history. Patients with complex sleep apnea syndrome had fewer maintenance-insomnia complaints (32{\%} vs 79{\%}; p < .05) than patients with CSA but were otherwise not significantly different clinically. Diagnostic apnea-hypopnea index for patients with complex sleep apnea syndrome, OSAHS, and CSA was 32.3 ± 26.8, 20.6 ± 23.7, and 38.3 ± 36.2, respectively (p = .005). Continuous positive airway pressure suppressed obstructive breathing, but residual apnea-hypopnea index, mostly from central apneas, remained high in patients with complex sleep apnea syndrome and CSA (21.7 ± 18.6 in complex sleep apnea syndrome, 32.9 ± 30.8 in CSA vs 2.14 ± 3.14 in OSAHS; p < .001). Conclusions: Patients with complex sleep apnea syndrome are mostly similar to those with OSAHS until one applies continuous positive airway pressure. They are left with very disrupted breathing and sleep on continuous positive airway pressure. Clinical risk factors don't predict the emergence of complex sleep apnea syndrome, and best treatment is not known.",
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N2 - Study Objectives: Some patients with apparent obstructive sleep apnea hypopnea syndrome (OSAHS) have elimination of obstructive events but emergence of problematic central apneas or Cheyne-Stokes breathing pattern. Patients with this sleep-disordered breathing problem, which for the sake of study we call the "complex sleep apnea syndrome," are not well characterized. We sought to determine the prevalence of complex sleep apnea syndrome and hypothesized that the clinical characteristics of patients with complex sleep apnea syndrome would more nearly resemble those of patients with central sleep apnea syndrome (CSA) than with those of patients with OSAHS. Design: Retrospective review Setting: Sleep disorders center. Patients or Participants: Two hundred twenty-three adults consecutively referred over 1 month plus 20 consecutive patients diagnosed with CSA. Interventions: NA. Measurements and Results: Prevalence of complex sleep apnea syndrome, OSAHS, and CSA in the 1-month sample was 15%, 84%, and 0.4%, respectively. Patients with complex sleep apnea syndrome differed in gender from patients with OSAHS (81% vs 60% men, p < .05) but were otherwise similar in sleep and cardiovascular history. Patients with complex sleep apnea syndrome had fewer maintenance-insomnia complaints (32% vs 79%; p < .05) than patients with CSA but were otherwise not significantly different clinically. Diagnostic apnea-hypopnea index for patients with complex sleep apnea syndrome, OSAHS, and CSA was 32.3 ± 26.8, 20.6 ± 23.7, and 38.3 ± 36.2, respectively (p = .005). Continuous positive airway pressure suppressed obstructive breathing, but residual apnea-hypopnea index, mostly from central apneas, remained high in patients with complex sleep apnea syndrome and CSA (21.7 ± 18.6 in complex sleep apnea syndrome, 32.9 ± 30.8 in CSA vs 2.14 ± 3.14 in OSAHS; p < .001). Conclusions: Patients with complex sleep apnea syndrome are mostly similar to those with OSAHS until one applies continuous positive airway pressure. They are left with very disrupted breathing and sleep on continuous positive airway pressure. Clinical risk factors don't predict the emergence of complex sleep apnea syndrome, and best treatment is not known.

AB - Study Objectives: Some patients with apparent obstructive sleep apnea hypopnea syndrome (OSAHS) have elimination of obstructive events but emergence of problematic central apneas or Cheyne-Stokes breathing pattern. Patients with this sleep-disordered breathing problem, which for the sake of study we call the "complex sleep apnea syndrome," are not well characterized. We sought to determine the prevalence of complex sleep apnea syndrome and hypothesized that the clinical characteristics of patients with complex sleep apnea syndrome would more nearly resemble those of patients with central sleep apnea syndrome (CSA) than with those of patients with OSAHS. Design: Retrospective review Setting: Sleep disorders center. Patients or Participants: Two hundred twenty-three adults consecutively referred over 1 month plus 20 consecutive patients diagnosed with CSA. Interventions: NA. Measurements and Results: Prevalence of complex sleep apnea syndrome, OSAHS, and CSA in the 1-month sample was 15%, 84%, and 0.4%, respectively. Patients with complex sleep apnea syndrome differed in gender from patients with OSAHS (81% vs 60% men, p < .05) but were otherwise similar in sleep and cardiovascular history. Patients with complex sleep apnea syndrome had fewer maintenance-insomnia complaints (32% vs 79%; p < .05) than patients with CSA but were otherwise not significantly different clinically. Diagnostic apnea-hypopnea index for patients with complex sleep apnea syndrome, OSAHS, and CSA was 32.3 ± 26.8, 20.6 ± 23.7, and 38.3 ± 36.2, respectively (p = .005). Continuous positive airway pressure suppressed obstructive breathing, but residual apnea-hypopnea index, mostly from central apneas, remained high in patients with complex sleep apnea syndrome and CSA (21.7 ± 18.6 in complex sleep apnea syndrome, 32.9 ± 30.8 in CSA vs 2.14 ± 3.14 in OSAHS; p < .001). Conclusions: Patients with complex sleep apnea syndrome are mostly similar to those with OSAHS until one applies continuous positive airway pressure. They are left with very disrupted breathing and sleep on continuous positive airway pressure. Clinical risk factors don't predict the emergence of complex sleep apnea syndrome, and best treatment is not known.

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