Adaptive servoventilation in patients with central or complex sleep apnea related to chronic opioid use and congestive heart failure.
OBJECTIVE
Adaptive servoventilation (ASV) is often used to treat central sleep apnea (CSA) and complex sleep apnea syndrome (CompSAS). Both CompSAS and CSA may occur in the setting of CHF and with the use of chronic opioids. We hypothesized that ASV would be less successful in treatment of CSA and CompSAS secondary to opioid use than in CHF patients.


METHODS
Consecutive patients were studied between January and December 2009 who underwent ASV titration for CSA or CompSAS due to CHF (defined as EF < 45%, or > 50% with evidence for diastolic dysfunction on echocardiogram) and chronic opioid users (defined by the use of opioids > 6 months).


RESULTS
Study included one hundred and eight patients with 77 males (71.3%) and 31 females (28.7%). Subjects had severe sleep apnea at baseline (AHI 45.6 ± 27.4) and inadequate control of sleep disordered breathing on CPAP (AHI 50.0 ± 32.2, CAI 36.6 ± 32). No significant differences were found between the groups in overall ASV success, defined as AHI < 10/h (p = 0.236). ASV was successful in 28 (59.6%) of those in the opioid group, compared to 43 (70.5%) of those in the CHF group. When ASV success was defined as AHI < 5/h at optimum EEP, there was again no significant difference between the groups (p-value = 0.812). Logistic regression showed unit increases in BMI, unit increases in HCO(3), and presence of CSR were each associated with decreased likelihood of ASV success.


CONCLUSIONS
We did not find a statistically significant difference in the effectiveness of ASV between CHF patients and chronic opioid users, with the overall success rate approaching 70%, as defined by an AHI < 10/h.


CONCLUSIONS
A commentary on this article appears in this issue on page 577.
Center for Sleep Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA. ramar.kannan@mayo.edu
Kannan
K
Ramar
Priya
P
Ramar
Timothy I
TI
Morgenthaler
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000701:Analgesics, Opioid / Q000009:adverse effects / Q000627:therapeutic use*; D045422:Continuous Positive Airway Pressure / Q000379:methods*; D005260:Female; D006333:Heart Failure / Q000150:complications* / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D017286:Polysomnography; D012189:Retrospective Studies; D012891:Sleep Apnea Syndromes / Q000150:complications* / Q000503:physiopathology; D020182:Sleep Apnea, Central / Q000150:complications* / Q000503:physiopathology / Q000628:therapy; D016896:Treatment Outcome
D000701:Analgesics, Opioid