Prevalence Of Central Sleep Apnea Research Articles

Prevalence of central sleep apnea among veterans and response rate to continuous positive airway pressure therapy.

Sleep-disordered breathing (SDB) is common in the Veteran population. In this retrospective study, we investigated the prevalence of comorbid central and obstructive SDB and the response rate to PAP among Veterans. Veterans were screened from a single VA medical center who had polysomnography (PSG) study from 2017 to 2021 to ascertain the presence, severity, and type of SDB by measuring the apnea-hypopnea index (AHI) and central apnea index (CAI). Patients were excluded if they did not have complete studies (diagnostic and PAP titration studies). The inclusion criteria for these analyses were central sleep apnea (CSA) defined as AHI ≥ 10 events/hour and CAI ≥ 5 events/hour. Diagnostic "CSA only" was defined as AHI ≥ 10 events/hour and CAI ≥ 50% of AHI. "OSA only" was defined if AHI ≥ 10 events/hour and CAI < 5 events/hour. Comorbid central and obstructive sleep apnea (COSA) was defined if AHI ≥ 10 events/hour and CAI > 5 events/hour but < 50% of AHI. The responsiveness to PAP therapy was determined based on the CAI < 5 events/hour on the titration study. A total of 90 patients met the inclusion criteria and from those 64 Veterans were found to have COSA (71%), 18 (20%) were CSA only, and 8 (9%) were OSA only. A total of 22 (24.4%) Veterans diagnosed with CSA or COSA were responsive to PAP therapy. Sixty days after treatment initiation, both responsive and nonresponsive groups had significant decreases in AHI and CAI (p < 0.05). Comorbid central and obstructive SDB is common among Veterans. The response to PAP therapy is suboptimal but improves over time.

O070 Prevalence of central sleep apnoea in people with tetraplegic spinal cord injury: a retrospective analysis of research and clinical data

Abstract Study Objectives Over 80% of people with tetraplegia have sleep disordered breathing, but whether this is predominantly obstructive or central is unclear. This study aimed to estimate the prevalence of central sleep apnoea (CSA) in tetraplegia and the contributions of central, obstructive and hypopnoea respiratory events to sleep disordered breathing summary indices in tetraplegia. Methods Research and clinical data from 606 individuals with tetraplegia and full overnight polysomnography were collated. The proportions of different respiratory event types were calculated; overall and for mild, moderate, and severe disease. The prevalence of Predominant CSA (central apnoea index 5 and more central than obstructive apnoeas) and Any CSA (central apnoea index  5) was estimated. Prevalence of sleep-related hypoventilation was estimated in a clinical sub-cohort. Results Respiratory events were primarily hypopnoeas (71%), followed by obstructive (23%), central (4%) and mixed apnoeas (2%). As severity increased, the relative contribution of hypopnoeas and central apnoeas decreased, while that of obstructive apnoeas increased. The prevalence of Predominant CSA and Any CSA were 4.3% (26/606) and 8.4% (51/606) respectively. Being male, on opiates and having a high tetraplegic spinal cord injury were associated with CSA. Sleep-related hypoventilation was identified in 26% (26/113) of the clinical sub-cohort. Conclusions This is the largest study to characterize sleep disordered breathing in tetraplegia. It provides strong evidence that obstructive sleep apnoea is the predominant sleep disordered breathing type; 9-18 times more prevalent than CSA. The prevalence of CSA was estimated to be 4-8%, significantly lower than previously reported.

Prevalence of central sleep apnea in people with tetraplegic spinal cord injury: a retrospective analysis of research and clinical data.

Over 80% of people with tetraplegia have sleep-disordered breathing (SDB), but whether this is predominantly obstructive or central is unclear. This study aimed to estimate the prevalence of central sleep apnea (CSA) in tetraplegia and the contributions of central, obstructive, and hypopnea respiratory events to SDB summary indices in tetraplegia. Research and clinical data from 606 individuals with tetraplegia and full overnight polysomnography were collated. The proportions of different respiratory event types were calculated; overall and for mild, moderate, and severe disease. The prevalence of Predominant CSA (Central Apnea Index [CAI] ≥ 5 and more central than obstructive apneas) and Any CSA (CAI ≥ 5) was estimated. Prevalence of sleep-related hypoventilation (SRH) was estimated in a clinical sub-cohort. Respiratory events were primarily hypopneas (71%), followed by obstructive (23%), central (4%), and mixed apneas (2%). As severity increased, the relative contribution of hypopneas and central apneas decreased, while that of obstructive apneas increased. The prevalence of Predominant CSA and Any CSA were 4.3% (26/606) and 8.4% (51/606) respectively. Being male, on opiates and having a high tetraplegic spinal cord injury were associated with CSA. SRH was identified in 26% (26/113) of the clinical sub-cohort. This is the largest study to characterize SDB in tetraplegia. It provides strong evidence that obstructive sleep apnea is the predominant SDB type; 9-18 times more prevalent than CSA. The prevalence of CSA was estimated to be 4%-8%, significantly lower than previously reported.

Phrenic nerve stimulation for treatment of central sleep apnea

The prevalence of central sleep apnea (CSA) is rare in general population. However, CSA is prevalent in those with cardiovascular and cerebrovascular disorders. CSA may persist or even worsen with positive airway pressure therapy in some patients and phrenic nerve stimulation (PNS) offers an alternative treatment for patients with CSA. The device is implanted similar to a cardiac pacemaker and typically followed in the sleep clinic. Multiple studies have described the efficacy and safety of PNS. Improvements were seen in apnea hypopnea events, central events, arousals, and daytime sleepiness and maintained through 5 years. Safety demonstrated a 91% freedom from serious adverse events through 1 year. The physiologic approach and improvement in sleep metrics and quality of life with a strong safety profile make this therapy a good option for many patients with central sleep apnea.

A Case of De Novo Positional Complex Sleep Apnea Syndrome (CompSAS)

Obstructive sleep apnea (OSA) is well known to often improve with non-supine positioning as opposed to supine positioning. Emerging research supports a role for sleep position management in patients with central sleep apnea (CSA) as well. We report a case of de novo complex sleep apnea syndrome (CompSAS) in a 78-year-old female, who presented after a car accident due to unclear syncope. Diagnostic polysomnography (PSG) showed moderate OSA. A CompSAS developed under automatic positive airway pressure (APAP), while 4 years of downloaded data showed good adherence. No significant benefit was reported under adaptive servo ventilation (ASV) and BiPAP-ST, while a reduction in CSA in the non-supine position was noticed. Oxygen and sleep positional therapy (SPT) were considered, resulting in a significant improvement in CSA and sleep quality. Further research on the prevalence of positional CSA is needed.

Abstract 15443: Association Between Central Sleep Apnea and P2y12 Inhibitors in Patients With Coronary Heart Disease

Introduction: Central sleep apnea (CSA) is common in patients with heart failure and is associated with a poor prognosis. A number of studies have linked the P2Y12 inhibitor, ticagrelor, with CSA. We aimed to evaluate CSA prevalence in patients with coronary heart disease (CHD) and whether ticagrelor use is associated with CSA in this population. Methods: We reviewed consecutive patients with CHD data who underwent a clinically indicated polysomnography (PSG) test over a 5-year period from three academic sleep centers. We sampled patients who were on ticagrelor or clopidogrel during their PSG test at a 1:4 ticagrelor:clopidogrel ratio. Patients with an active opioid prescription at time of PSG test were excluded. Age, left ventricle (LV) dysfunction (ejection fraction &lt;45%), and P2Y12 inhibitor use were included in a multivariate logistic regression. Results: A total of 141 patients (age 63.7 ± 11.4, 33% female) were included with 30 on ticagrelor and 111 on clopidogrel. 106 (75.2%) patients had undergone percutaneous coronary intervention for ACS. 33 (23.4%) patients had LV dysfunction. The mean apnea hypopnea index (AHI) was 29 (/hr). High CSA burden (central apnea index [CAI] ≥5/h) and strict CSA (AHI ≥5/h and CAI &gt;50% of AHI) were present in 16 (11.3%) and 5 (3.5%) patients, respectively. High CSA burden and strict CSA were more common in patients on ticagrelor than in those on clopidogrel (7 [23.3%] vs. 9 [8.1%] and 3 [10.0%] vs. 2 [1.8%]). In multivariable analysis ticagrelor use was associated with high CSA burden adjusting for LV dysfunction and age (OR 3.27, 95% CI 0.99-10.7, p=0.048). No variables were associated with strict CSA. Conclusions: Ticagrelor use was associated with high CSA burden in patients with coronary heart disease. Future studies should verify these results in a larger cohort and explore their clinical significance.

Impact of sleep-disordered breathing on the management of children with Chiari malformation type I.

Children with Chiari malformation type I (CM-I) have an increased risk of sleep apnea. The aim of the study was to describe the management of CM-I patients in relation to symptoms, magnetic resonance imaging (MRI) findings and sleep apnea syndrome (SAS). We performed a retrospective analysis of clinical charts of all 57 CM-I patients seen between September 2013 and April 2017. A total of 45 patients had isolated CM-I or associated co-morbidity (CM-Iia), 5 had craniosynostosis (CM-Ics), and 7 a polymalformative syndrome (CM-Ipm). The prevalence of SAS, defined as an apnea-hypopnea index >1 event/h, was high in CM-I ranging from 50% to 80% according to the CM-I group. The prevalence of central sleep apnea (CSA) was low, with 5 (9%) patients having CSA and only 3 patients with CM-Iia having isolated CSA. A total of 17 patients (30%) had foramen magnum decompression (FMD). Neither positive symptoms of CM-I nor MRI findings alone, nor both combined were good indicators for FMD. No correlation was observed between the cerebellar tonsil descent and SAS in CM-I. But all 5 patients with CSA had a FMD. The combination of MRI findings and/or symptoms of CM-I together with moderate-to-severe SAS best discriminated patients who needed a FMD. Our findings highlight the importance of a combined evaluation of symptoms, MRI and polygraphy results in the management of CM-I patients.

0702 Real World Characteristics of Central Sleep Apnea: Experience at One Academic Medical Center

Abstract Introduction Despite growing recognition of sleep disordered breathing, the prevalence and clinical characteristics of central sleep apnea (CSA) in real-world sleep referral populations remain poorly understood. We used historical data from the University of Pittsburgh Medical Center (UPMC) to assess the differences in patients with CSA compared to obstructive sleep apnea (OSA). Methods We retrospectively reviewed the medical records of 29,803 patients who underwent in-lab diagnostic polysomnography at six UPMC sleep labs between 2004 and 2018. Baseline clinical characteristics and polysomnography results including apnea hypopnea index (AHI), central apnea index (CAI), and obstructive apnea index (OAI) were extracted from the electronic health record. Among those with AHI≥5, patients were categorized as CSA if CAI≥5 and CAI&amp;gt;OAI or OSA if OAI≥5 and OAI&amp;gt;CAI. Results CSA and OSA were identified in 2% (583/29,803) and 34% (10,090/29,803) of patients, respectively, while 32% had AHI≥5 but didn’t meet either CSA or OSA criteria (CAI and OAI&amp;lt;5 or CAI=OAI) and the remaining 32% had AHI&amp;lt;5. Median AHI was 41 events/hr for CSA vs. 36 events/hr for OSA (p&amp;lt;0.01). The median percentage of apneas being central was 78% for CSA vs. 0% for OSA (p&amp;lt;0.01). Compared to patients with OSA, those with CSA were more likely to be male (78% vs. 66%), older (58 vs. 54 yrs), have lower body mass index (32 vs. 35 kg/m2), have heart failure (23% vs. 13%), atrial fibrillation (19% vs. 8%), stroke (5% vs. 2%), myocardial infarction (7% vs. 2%), diabetes (27% vs. 22%) and have received a prescription for methadone (1.5% vs. 0.3%) [all p&amp;lt;0.01]. In multivariable logistic regression, all factors except stroke remained independently associated with CSA. The strongest predictors of CSA (compared to OSA) were methadone prescription (adjusted odds ratio=4.9, 95% CI [2.3-10.6]) and myocardial infarction (1.9, [1.3-2.8]). In contrast, the prevalence of CSA and OSA were similar across races. Conclusion CSA was identified in 2% of patients undergoing polysomnography in everyday clinical practice and independently associated with a variety of clinical characteristics. Recognition of characteristics associated with CSA can lead to more targeted screening and treatment in a broader population beyond just heart failure patients. Support (If Any) ZOLL Respicardia, Inc.

Assessment of Central Sleep Apnea Events in Children with Sleep-Disordered Breathing.

Purpose To determine the prevalence of central apnea (CA) events and central sleep apnea (CSA) in children with sleep-disordered breathing (SDB) and to assess the effect of tonsillectomy and adenoidectomy (TA) on CSA in children with obstructive sleep apnea (OSA). Material and Methods. The medical charts of children with SDB were reviewed to obtain information on past medical history, polysomnography (PSG) findings, and surgical management. Counts and indexes of obstructive apnea, obstructive hypopnea, and central apnea were evaluated before and after TA. The prevalence of CSA and the effect of age, gender, obesity, and comorbid conditions on CSA were assessed in children with SDB as well as in children with PSG proven OSA. Results Seven hundred twelve children with SDB (age range: 1 to 18 yrs, mean: 5.8 ± 3.4) were identified. CA events occurred in 640 of 712 (89.5%) patients. Of the 712 patients, 315 (44.2%) met the criteria for the diagnosis of CSA. CSA was more prevalent in toddlers and preschoolers (p < 0.001). Obese children had a higher prevalence of CSA compared to nonobese children (p < 0.001). The prevalence of CSA in patients with OSA was 45.4%. The number of CA events, CAI, and OAHI after TA was less than that of before TA (p < 0.001). Residual CSA after TA occurred in 20 children (26%). Conclusion Central apnea events and central sleep apnea occur in children who present to a pediatric otolaryngology clinic for evaluation of sleep disordered breathing. Central sleep apnea and obstructive sleep apnea both improve after tonsillectomy and adenoidectomy.

Prevalence and clinical characteristics of sleep-disordered breathing in patients with heart failure of different left ventricular ejection fractions.

The prevalence of sleep-disordered breathing (SDB) is high in patients with heart failure (HF), while the prevalence of SDB in HF with different left ventricular ejection fractions (LVEF) has rarely been reported. We aimed to explore the prevalence and clinical characteristics of SDB in patients withHF having different LVEF. Patients with stable HF were consecutively enrolled. All patients underwent portable overnight cardiorespiratory polygraphy and echocardiography. According to their LVEF, the patients were divided into the HFrEF (HF with reduced EF, EF < 40%), HFmrEF (HF with mid-range EF, 40 ≤ EF < 50), and HFpEF groups (HF with preserved EF, EF ≥ 50%). The prevalence and clinical data of SDB among the 3 groups were then compared. A total of 252 patients, including 134 men, were enrolled in the study. The prevalence of SDB inpatients with HF was 70%. Obstructive sleep apnea (OSA) was diagnosed in48% and central sleep apnea (CSA) in 22%. The prevalence of SDB in the HFrEE, HFmrEF, and HFpEF groups was 86%, 86%, and 62%, respectively (P = 0.001). The prevalence of OSA among the 3 groups was 42%, 47%, and 49%, respectively (P = 0.708), while the prevalence of CSA among the 3 groups was 44%, 40%, and 13% (P < 0.001). Logistic regression analysis revealed that age and BMI were independent risk factors for OSA in patientswith HF, while LVEF and smoking were independent risk factors for CSA in patientswith HF. Correlational analyses revealed that LVEF was negatively correlated with apnea-hypopnea index (AHI) (r = -0.309, P < 0.001) and central apnea index (CAI) ( r = -0.558, P < 0.001), while there was no significant correlation with obstructive apnea index (OAI). The ROC curve revealed that LVEF could predict the occurrence of CSA and SDB, with AUC = 0.683 (95%CI 0.600-0.767, P < 0.001) and AUC = 0.630 (95%CI 0.559-0.702, P = 0.001), but not of OSA. SDB was highly common in HF, and the prevalence of SDB was different in HF with different LVEF, mainly due to the difference in cardiac functions. The prevalence and severity of SDB in HFrEF and HFmrEF were significantly higher than those in HFpEF, which was mainly related to the increase in CSA. When HFmrEF was similar to HFrEF in cardiac functions, the prevalence, type, and severity of SDB were similar between the two groups. Changes in LVEF had a significant impact on CAI, but not on OAI. LVEF can predict the occurrence of CSA and SDB to a certain extent.

Adaptive support ventilation as an effective treatment option for central sleep apnea in an older adult with heart failure with preserved ejection fraction: a case report

BackgroundAdaptive support ventilation (ASV) is a proposed treatment option for central sleep apnea (CSA). Although the effectiveness of ASV remains unclear, some studies have reported promising results regarding the use of ASV in patients with heart failure with preserved ejection fraction (HfpEF). To illustrate the importance of suspecting and diagnosing sleep-disordered breathing (SDB) in older adults unable to recognize symptoms, we discuss a case in which ASV was effective in a patient with CSA and HfpEF, based on changes in the Holter electrocardiogram (ECG).Case presentation.An 82-year-old man presented to our hospital with vomiting on April 19, 2021. Approximately 10 years before admission, he was diagnosed with type 1 diabetes mellitus and recently required full support from his wife for daily activities due to cognitive dysfunction. Two days before admission, his wife was unable to administer insulin due to excessively high glucose levels, which were displayed as “high” on the patient’s glucose meter; therefore, we diagnosed the patient with diabetic ketoacidosis. After recovery, we initiated intensive insulin therapy for glycemic control. However, the patient exhibited excessive daytime sleepiness, and numerous premature ventricular contractions were observed on his ECG monitor despite the absence of hypoglycemia. As we suspected sleep-disordered breathing (SDB), we performed portable polysomnography (PSG), which revealed CSA. PSG revealed a central type of apnea and hypopnea due to an apnea–hypopnea index of 37.6, which was > 5. Moreover, the patient had daytime sleepiness; thus, we diagnosed him with CSA. We performed ASV and observed its effect using portable PSG and Holter ECG. His episodes of apnea and hypopnea were resolved, and an apparent improvement was confirmed through Holter ECG.ConclusionMedical staff should carefully monitor adult adults for signs of or risk factors for SDB to prevent serious complications. Future studies on ASV should focus on older patients with arrhythmia, as the prevalence of CSA may be underreported in this population and determine the effectiveness of ASV in patients with HfpEF, especially in older adults.

Cross-ethnic comparison of the association between central sleep apnea and atrial fibrillation/flutter: The Kuakini Honolulu-Asia Aging Study and the Osteoporotic Fractures in Men (Mr.OS) study.

IntroductionFew studies indicated the impact of ethnicity on an association between central sleep apnea (CSA) and atrial fibrillation/flutter (AF) in older populations. We assessed possible ethnic differences in the association among elderly Japanese-American and White-American men.MethodsWe performed a cross-sectional analysis using two population studies of Japanese-American and White-American men. The Kuakini Honolulu-Asia Aging Study is a longitudinal cohort study of Japanese-American men living in Hawaii. Sleep data were collected between 1999 and 2000. The Osteoporotic Fractures in Men (Mr.OS) Sleep Study was conducted between 2003 and 2005 on the continental U.S. The majority of Mr.OS participants were White-American. We selected 79–90 year old males, who had overnight polysomnography from both studies. Total participants were 690 Japanese-American and 871 White-American men. The central apnea index (CAI) was the measure of the number of central apneas. CSA was defined by CAI>=5. Cheyne-Stokes breathing (CSB) was defined as a minimum consecutive 5–10 min period of a crescendo-decrescendo respiratory pattern associated with CSA.ResultsThe prevalence of AF was 5.7% in Japanese-American men and 9.0% in White-American men. The prevalence of CSA and CSB in White-Americans were higher than in Japanese-Americans (11.5% vs 6.5% and 5.7% vs 3.3%, respectively). In multivariable-adjusted logistic regression models, CSA was associated with higher odds of AF, and the association was stronger in Japanese-Americans [Odds Ratio (OR) = 4.77, 95% confidence interval (CI): 1.95–11.67] than in White-Americans (OR = 2.09, 95 %CI: 1.09–4.01). CSB showed similar trends as CSA.ConclusionsAfter adjustment, CSA and CSB were significantly associated with AF in both Japanese-American and White-American men.

396 Ethnicity modifies the association between central sleep apnea and atrial fibrillation in older men: Kuakini HAAS and Mr.OS

Abstract Introduction Several studies indicated there is an association between central sleep apnea (CSA) and atrial fibrillation (AF) in older populations. However, few studies assessed the impact of ethnicity on the association. We assessed the hypothesis that ethnicity modifies the association between CSA and AF in older men. Methods We did a cross-sectional analysis using two population studies of Japanese-American (JA) and White-American (WA) men. The Kuakini Honolulu-Asia Aging Study (HAAS) is a longitudinal cohort study of JA men living in Hawaii. Sleep data were collected between 1999–2000. The Osteoporotic Fractures in Men (Mr.OS) Sleep Study was conducted between 2003–2005 on the continental U.S. The majority of Mr.OS participants were WA. We selected 79–90 year old males, who had overnight polysomnography from both studies. Total participants were 690 JA and 871 WA men. Obstructive apnea-hypopnea index (OAHI) was the measure of the number of obstructive apneas and hypopneas with &amp;gt;4% oxygen desaturation. Additionally, the central apnea index (CAI) was the measure of the number of central apneas. Obstructive sleep apnea (OSA) was categorized as none (OAHI &amp;lt;5), mild (OAHI 5–14), moderate (OAHI 15–29), and severe (OAHI&amp;gt;=30). CSA was defined by CAI&amp;gt;=5. Cheyne-Stokes breathing (CSB) was defined as a minimum consecutive 5–10 minute period of a crescendo-decrescendo respiratory pattern associated with CSA. A board-certified physician confirmed AF by single lead electrocardiography of polysomnography. Results The prevalence of AF was 5.7% in JA and 9.1% in WA. The prevalence of CSA and CSB in WA were higher than in JA (11.5% vs 6.5% and 5.7% vs 3.3%, respectively). Conversely, the prevalence of severe OSA in JA (20.7%) was higher than in WA (11.8%). In multivariable-adjusted logistic regression models, CSA was associated with higher odds of AF, and the association was stronger in JA [Odds Ratio (OR)=4.77, 95% confidence interval (CI): 1.95–11.64] than in WA (OR=2.05, 95% CI: 1.07–3.94). CSB showed similar trends as CSA. In contrast, the severity of OSA was not significantly associated with AF in either ethnicity. Conclusion Ethnicity modifies the association between CSA and AF. In older JA and WA men, screening for CSA might be important to prevent AF. Support (if any):

Heart failure is not a determinant of central sleep apnea in the pediatric population.

Adults with heart failure (HF) have high prevalence of central sleep apnea (CSA). While this has been repeatedly investigated in adults, there is a deficiency of similar research in pediatric populations. The goal of this study was to compare prevalence of CSA in children with and without HF and correlate central apneic events with heart function. Retrospective analysis of data from children with and without HF was conducted. Eligible children were less than 18 years old with echocardiogram and polysomnogram within 6 months of each other. Children were separated into groups with and without HF based on left ventricular ejection fraction (LVEF). Defining CSA as central apnea-hypopnea index (CAHI) more than 1/hour, the cohort was also classified into children with and without CSA for comparative study. A total of 120 children (+HF: 19, -HF: 101) were included. The +HF group was younger, with higher prevalence of trisomy 21, muscular dystrophy, oromotor incoordination, and structural heart disease. The +HF group had lower apnea-hypopnea index (median: 3/hour vs. 8.6/hour) and lower central apnea index (CAI) (median: 0.2/hour vs. 0.55/hour). Prevalence of CSA was similar in both groups (p = .195). LogCAHI was inversely correlated to age (Pearson correlation coefficient: -0.245, p = .022). Children with CSA were younger and had higher prevalence of prematurity (40% vs. 5.3%). There was no significant difference in LVEF between children with and without CSA. After excluding children with prematurity, relationship between CAHI and age was no longer sustained. In contrast to adults, there is no difference in prevalence of CSA in children with and without HF. Unlike in adults, LVEF does not correlate with CAI in children. Overall, it appears that central apneic events may be more a function of age and prematurity rather than of heart function.

Ticagrelor could cause central sleep apnea after acute coronary syndrome in patients without left ventricular dysfunction or heart failure

Abstract Background Although the prevalence of obstructive sleep apnea (OSA) syndrome is high in patients with acute coronary syndrome (ACS), little is known about central sleep apnea (CSA) in these patients, especially if they have no left ventricular dysfunction (indeed, it is well known that heart failure could be a confounding factor as it is an important cause of CSA). Furthermore, central apnea could be promoted by ticagrelor, a relatively new drug, already known to cause dyspnea (which could modify the apneic threshold) in some patients. Purpose To investigate the prevalence of central sleep apnea in patients without left ventricular dysfunction after ACS. Methods Monocentric prospective survey. All consecutive patients within 365 days after ACS were included if they had (1) left ventricular ejection fraction LVEF &amp;gt;45%, (2) no history of heart failure, (3) systolic arterial pulmonary artery pressure &amp;lt;45 mm Hg, and (4) no history of sleep apnea. After inclusion, patients underwent an overnight sleep study with a portable sleep monitor validated to differentiate central and obstructive apneas. Patients were then classified as “normal” patients if they had an AHI (apnea hypopnea index) &amp;lt;15, “CSA patients” if they had an AHI &amp;gt;15 with a majority of central sleep apneas and “OSA patients” if they had an AHI &amp;gt;15 with a majority of obstructive sleep apneas. Results Between January 2018 and January, 2020, we included 115 consecutive patients (age 56.1±10.5, male 84%, mean body mass index 28.4±4.5, LVEF: 56±4%). Sleep study was performed 68±62 days (7–350 days) after ACS on average. All of the patients were receiving a single or (mostly) dual antiplatelet therapy: aspirin (n=114: 99%, ticagrelor (n=80: 69.5%), clopidogrel (n=28: 24%), prasugrel (n=4: 3.5%). Finally 80 patients were taking ticagrelor, while 35 were not. A total of 49/115 patients (42.6%) had a clinically significant (moderate to severe) sleep disordered breathing, with an AHI&amp;gt;15: (CSA: n=27/115: 23.5%, OSA:n=22/115: 19%). Among them, 25/115 patients (22%) had a severe (AHI &amp;gt;30) sleep disordered breathing: CSA 12% OSA: 10%. Among patients receiving ticagrelor, 24/80 (30%) had a CSA with an AHI &amp;gt;15, while, in patients not taking ticagrelor only 3/35 (8.5%) had CSA with an AHI &amp;gt;15 (p=0.04) Conclusion As expected, OSA is frequent after ACS, as in all types of coronary artery disease patients. High prevalence of CSA was less expected and seemed to be correlated with ticagrelor administration. This monocentric survey is a preliminary safety signal. Further studies are needed to investigate the exact incidence, the sustainability and the potential consequences of ticagrelor induced central sleep apnea. Funding Acknowledgement Type of funding source: None

The influence of opioids and nonopioid central nervous system active medications on central sleep apnea: a case-control study.

Opioids are known to contribute to central sleep apnea (CSA), but the influence of nonopioid central nervous system active medications (CNSAMs) on CSA remains unclear. In light of the hypothesized impact of nonopioid CNSAMs on respiration, we examined the relationships between the use of opioids only, nonopioid CNSAMs alone, and their combination with CSA. Among all adults who underwent polysomnography testing at the University of Michigan's sleep laboratory between 2013 and 2018 (n = 10,606), we identified 212 CSA cases and randomly selected 300 controls. Participants were classified into four groups based on their medication use: opioids alone, nonopioid CNSAMs only, their combination, and a reference group, including those who did not use any of these medications. We defined CSA as a binary outcome and as a continuous variable using central apnea index data. Logistic and linear regression were used to examine associations between medication use, CSA diagnosis, and central apnea index. Study participants included 58% men, and mean age was 50 (± 14 standard deviation years. Nearly half of the study participants did not use opioids or nonopioid CNSAMs, 6% used opioids alone, 27% nonopioid CNSAMs alone, and 16% used a combination of these medications. In adjusted analyses, opioids-only users had a nearly twofold increase in CSA odds, whereas those who used a combination of opioids and nonopioid CNSAMs had fivefold higher odds of CSA relative to the reference group. In contrast, the use of nonopioid CNSAMs alone had protective associations with CSA. This report showed increased odds of CSA, particularly among patients with sleep complaints who were prescribed opioids in combination with nonopioid CNSAMs compared with those who did not use any of these medications.

Atrial fibrillation is associated with central sleep apnea in clinic patients undergoing diagnostic polysomnography.

IntroductionSleep apnea is highly prevalent in patients with atrial fibrillation (AF). Obstructive sleep apnea (OSA) is the most common type, and best studied in the context of AF. However, recent investigations have indicated that central sleep apnea (CSA) may be a risk factor for incident AF. We evaluated the burden of CSA events in patients referred for diagnostic polysomnography (PSG) and whether AF is associated with CSA.MethodsWe identified patients with and without a history of AF who underwent clinically indicated PSG in a matched manner. OSA was defined as obstructive apnea‐hypopnea index (AHI) ≥15/h, and CSA was defined as central apnea index (CAI) ≥5/h. The association between AF and CSA was evaluated using multivariable logistic regression.ResultsAmong 465 patients included, mean AHI was 25.5/h, and mean CAI was 1.7/h. OSA prevalence was 53.3%, while CSA prevalence was 8.4%. The prevalence of OSA in the AF and non‐AF groups (54.7% vs 52.0%, P = .56) was similar. CSA was more common in the AF group (12.3% vs 4.4%, P = .002). In multivariable analysis, AF (OR: 2.19 [1.02, 5.03], P = .05), male gender (OR: 2.5 [1.17, 5.84], P = .02), and older age (OR: 2.44, [1.16, 5.46], P = .02) were associated with CSA.ConclusionThough CSA is much less common than OSA in patients with AF, the presence of AF is independently associated with CSA.

Central sleep apnea is uncommon after stroke

Objective/backgroundStroke is often considered a risk factor for central sleep apnea (CSA). The goal of this study was to determine the prevalence and clinical correlates of CSA in patients with ischemic stroke. Patients/methodsIn this analysis, 1346 participants in the Brain Attack Surveillance in Corpus Christi (BASIC) project underwent a home sleep apnea test shortly after ischemic stroke. Respiratory events during sleep were classified as central apneas, obstructive apneas, or hypopneas. Central apnea index (CAI) was defined as number of central apneas divided by recording time. CSA was defined as CAI ≥5/hour with at least 50% of all scored respiratory events classified as central apneas. Demographics and co-morbidities were ascertained from the medical record. ResultsMedian CAI was 0/hour. Nineteen participants (1.4%) met criteria for CSA. Participants with CSA were more likely to be male, and had lower prevalence of obesity than participants without CSA. There was no association between CSA and other co-morbidities. ConclusionsCSA was uncommon in this large cohort of patients with recent ischemic stroke.

1238 Central sleep apnea with Cheyne Stokes breathing in a pediatric patient with heart failure

Abstract Introduction Central sleep apnea due to Cheyne-Stokes breathing (CSA-CSB) commonly occurs in adult patients with chronic heart failure, but has rarely been described in children. We describe a case of CSA-CSB in a pediatric patient with dilated cardiomyopathy and acute heart failure. Report of Case A 12-year-old is admitted to the intensive care unit in the setting of new diagnosis of dilated cardiomyopathy leading to acute systolic and diastolic heart failure requiring inotropic infusions. After admission she is noted to have self-resolving desaturations on continuous pulse oximetry while asleep. Sleep medicine is consulted for further evaluation. She has desaturations during naps and night-time sleep that are not associated with any snoring, congestion, cough, choking, or gagging. She underwent adenotonsillectomy 7 years prior. Her father has dilated cardiomyopathy. Current medications are spironolactone, furosemide, ranitidine, loratadine, enoxaparin, milrinone and epinephrine infusion. Physical exam reveals an obese girl with absent tonsils, clear breath sounds, and tachycardia. Cardiac MRI showed severely dilated left ventricle with global hypokinesia and depressed function (EF 7%). Polysomnography reveals AHI 24.2/hr, with oAHI 0/hr and cAHI 24.2/hr. No snoring, flow limitation, or thoracoabdominal paradox is seen. Cheyne-Stokes respiration is present leading to diagnosis of CSA-CSB. Supplemental oxygen is provided to blunt desaturations. While waiting for titration PSG she underwent placement of a left ventricular assist device and orthotopic heart transplantation. Following heart transplantation she had resolution of desaturations while asleep without supplemental oxygen; family declined repeat polysomnography. Conclusion Central sleep apnea with Cheyne-Stokes breathing is associated with increased mortality in adult patients with heart failure and provides important prognostic information if identified. The prevalence of central sleep apnea and its implications are unknown in pediatric patients and our case highlights the need to consider sleep disordered breathing as a cause of desaturations in patients with acute heart failure.

Central sleep apnea syndrome prevalence is high early after an acute coronary syndrome without heart failure or left ventricular dysfunction

Although the prevalence of obstructive sleep apnea (OSA) syndrome is high in patients with acute coronary syndrome (ACS), little is known about central sleep apnea (CSA) prevalence in these patients, especially if they have no left ventricular dysfunction. Furthermore, central apnea could be promoted by ticagrelor, a relatively new drug. To investigate the prevalence of central sleep apnea in patients without left ventricular dysfunction after an ACS. All consecutive patients within 100 days after an ACS were included if they had left ventricular ejection fraction (LVEF) > 45%, no history of heart failure, systolic arterial pulmonary artery inferior to 45 mm Hg, no known history of sleep apnea, and if they were not receiving a sedative drug. After inclusion, patients underwent an overnight sleep study with a Nox T3 portable sleep monitor. Between May 1, 2018 and April 10, 2019, we included 50 consecutive patients 43 ± 24 days after an ACS (age 56.1 ± 10.5, male 54%, mean body mass index 28.6 ± 4.9, mean LVEF: 55.5 ± 4.9%). All of them were receiving a dual antiplatelet therapy: aspirin 100%, ticagrelor 85%, clopidogrel 10%, prasugrel 5%. 23 patients (46%) had a clinically significant (moderate to severe) apnea hypopnea index (AHI) > 15/h: CSA: 24%, OSA: 22%. Among them 13 (26%) had a severe sleep breathing disorder(AHI >30): CSA 16% OSA: 10%. The only favoring factor to have an AHI > 30 was timing for the sleep diagnostic test: 29 ± 24 days in patients with AHI > 30 versus 49 ± 22 days in the other patients, P = 0.01. The role of ticagrelor could not be assessed because nearly all of the patients received it. As expected, OSA is frequent in coronary artery disease patients (early after ACS in this study). High prevalence of CSA was less expected. Our results suggest that, before looking for another (neurological) cause, confirmation of CSA should be done at least 2 months after the ACS.