Central sleep apnea (CSA) is a highly prevalent comorbidity in patients with heart failure and may present in 25 to 40 percent of heart failure patients. Continuous positive airway pressure (CPAP) is the primary therapeutic option and effective in treatment of obstructive sleep apnea (OSA). In heart failure patients with CSA, several trials of CPAP showed a number of positive effects in heart failure treatment. A 58-year-old male visited the hospital because of dyspnea and he was diagnosed as heart failure with ischemic heart disease. He underwent coronary angiography and received percutaneous coronary intervention due to stenosis at the middle of left anterior descending coronary artery. However, dyspnea was not completely improved after treatment with percutaneous coronary intervention. The patient also experienced snoring and sleep apnea which worsened with symptom of dyspnea in the recent year. We suspected CSA and the patient underwent polysomnography to confirm whether sleep apnea was present. During the polysomnography, CSA with Cheyne-Stokes respiration (CSR) was observed and apnea-hypopnea index was 45.9/hr. The patient was treated with CPAP. After CPAP treatment, hypoxemia and CSA were resolved and dyspnea was improved with reducing NYHA class. We report a case successfully treated with clinical improvement by presuming CSA in a patient with heart failure.
Anoxia ; Cheyne-Stokes Respiration ; Comorbidity ; Constriction, Pathologic ; Continuous Positive Airway Pressure* ; Coronary Angiography ; Coronary Vessels ; Dyspnea ; Heart Failure* ; Heart* ; Humans ; Male ; Middle Aged ; Myocardial Ischemia ; Percutaneous Coronary Intervention ; Polysomnography ; Sleep Apnea Syndromes ; Sleep Apnea, Central* ; Sleep Apnea, Obstructive ; Snoring

BACKGROUND AND OBJECTIVES: Obstructive sleep apnea syndrome is one type of sleep disorder breathing. During sleep, in respiration, nasal obstruction causes negative pressure, which in turn causes the pharyngeal airway to collapse during inspiration. We investigated how nasal surgery affects patients who have undergone OSA surgery but still suffer from the remaining symptoms of snoring and sleep disorder breathing. SUBJECTS AND METHOD: We reviewed 24 patients, who had undergone obstructive sleep apnea (OSA) surgery only to show no enhancement in snoring and qualities of sleep; they showed nasal septal deviation or inferior turbinate hypertrophy. Septal surgery or inferior turbinoplasty was performed by the same otolaryngologist. Over the period between preoperation and 1, 3, 6, 12 months after operation, we evaluated Apnea-Hypopnea Index (AHI) and oxygen saturation by polysomnography, degree of snoring by Visual Analogue Sacle (VAS) score, satisfaction for quality of sleep by Epworth Sleepiness Scale (ESS), minimal cross section area and volume of nasal cavity by acoustic rhinometry, respectively. RESULTS: After nasal surgery, the volume of nasal cavity and MCA increased. There were significant improvements of AHI, oxygen saturation, VAS and ESS score. CONCLUSION: As for OSA surgery, the evaluation of nasal cavity is an indispensible factor for improving the quality of sleep and snoring. When treating OSA patients who have nasal obstruction, nasal surgery including septoplasty and inferior turbinoplasty should be considered.
Humans ; Hypertrophy ; Methods ; Nasal Cavity ; Nasal Obstruction ; Nasal Surgical Procedures* ; Oxygen ; Polysomnography ; Respiration ; Rhinometry, Acoustic ; Sleep Apnea Syndromes* ; Sleep Apnea, Obstructive* ; Sleep Wake Disorders ; Snoring* ; Turbinates

BACKGROUND: The aim of this study was to investigate the predictive value of snoring frequency in the diagnosis and severity of obstructive sleep apnea. METHODS: Patients who underwent polysomnography with one or more of the following characteristics were included: 1) sleepiness, non-restorative sleep, fatigue, or insomnia symptoms; 2) arousal due to cessation of breathing or the occurrence of gasping or choking when waking up; and 3) habitual snoring, breathing interruptions, or both, noted by a bed partner or other observer. We analyzed the differences in clinical and polysomnographic variables between patients with and without obstructive sleep apnea and investigated the associations of those variables with obstructive sleep apnea severity. RESULTS: One hundred ninety-three patients met the inclusion criteria, and 145 of the 193 patients were diagnosed with obstructive sleep apnea. Multiple logistic regression analysis showed that large neck circumference (p = 0.0054) and high snoring index (p = 0.0119) were independent predictors for obstructive sleep apnea. Moreover, between the obstructive sleep apnea severity groups, there was a strong tendency of difference in body mass index (p = 0.0441) and neck circumference (p = 0.0846). However, there was no significant difference in snoring frequency according to obstructive sleep apnea severity (p = 0.4914). CONCLUSIONS: We confirmed that snoring frequency is a predictor of obstructive sleep apnea. In addition, we showed for the first time that snoring frequency is not associated with obstructive sleep apnea severity, thus it is not a valuable marker for predicting obstructive sleep apnea severity.
Airway Obstruction ; Arousal ; Body Mass Index ; Diagnosis ; Fatigue ; Humans ; Logistic Models ; Neck ; Polysomnography ; Respiration ; Sleep Apnea Syndromes ; Sleep Apnea, Obstructive* ; Sleep Initiation and Maintenance Disorders ; Snoring*

Obesity hypoventilation syndrome (OHS) is characterized by severe obesity, excessive daytime sleepiness, hypoxemia and hypercapnea. Because OHS mimics pulmonary hypertension or cor pulmonale, clinicians should recognize and treat this syndrome appropriately. A 58-year-old female visited the emergency room because of dyspnea. She was obese and had kyphoscoliosis. The patient also experienced snoring, recurrent choking during sleep and daytime hypersomnolence which worsened after gaining weight in the recent year. The arterial blood gas analysis showed she experienced hypoxemia and hypercapnea not only during nighttime but also daytime. We suspected OHS and the patient underwent polysomnography to confirm whether obstructive sleep apnea was present. During the polysomnography test, sleep obstructive apnea was observed and apnea-hypopnea index was 9.2/hr. The patient was treated with bilevel positive airway pressure therapy (BiPAP). After BiPAP for 4 days, hypoxemia and hypercapnia were resolved and she is currently well without BiPAP. We report a case successfully treated with clinical improvement by presuming OHS early in a patient who had typical OHS symptoms, even while having other conditions which could cause hypoventilation.
Airway Obstruction ; Anoxia ; Apnea ; Blood Gas Analysis ; Disorders of Excessive Somnolence ; Dyspnea ; Emergency Service, Hospital ; Female ; Humans ; Hypercapnia ; Hypertension, Pulmonary ; Hypoventilation ; Middle Aged ; Obesity Hypoventilation Syndrome* ; Obesity, Morbid ; Polysomnography ; Pulmonary Heart Disease ; Sleep Apnea, Obstructive ; Snoring

Obstructive sleep apnea (OSA) is a chronic sleep-related breathing disorder that requires long-term management. If OSA remains untreated, it can result in serious health consequences, including increased risk of both cardiovascular and cerebrovascular diseases. Polysomnography is considered to be the gold standard for diagnosing OSA; however, it is relatively expensive, time-consuming and technically complex. Thus, there is a growing interest in the use of simple and efficient screening tools for OSA. Although screening questionnaires such as the Berlin Questionnaire, the STOP Questionnaire, and the STOP-Bang Questionnaire are widely used to assess the presence of OSA, the findings regarding their diagnostic accuracy are not consistent. This review provides a descriptive summary of the scientific studies evaluating the accuracy of diagnostic tests for OSA.
Berlin ; Cerebrovascular Disorders ; Diagnosis ; Diagnostic Tests, Routine ; Mass Screening ; Polysomnography ; Respiration ; Sensitivity and Specificity ; Sleep Apnea Syndromes ; Sleep Apnea, Obstructive ; Surveys and Questionnaires

BACKGROUND AND OBJECTIVES: The aim of this study is to identify differences in polysomnographic findings according to the upper airway obstruction level in patients with obstructive sleep apnea (OSA). SUBJECTS AND METHOD: Eighty-four patients with OSA were included in this study. Every patient underwent polysomnography (PSG) and upper airway pressure measurement using a four-sensor catheter simultaneously. The catheter was positioned at the posterior nasal cavity, uvula tip, tip of the epiglottis, and mid-esophagus level, which was inserted through the nasal cavity down to the esophagus. The patients were categorized into two groups of single site obstruction and multi-site obstruction. RESULTS: Twenty-one patients showed single site obstruction and sixtythree patients showed multi-site obstruction. Apnea-hypopnea index, apnea index, and minimal oxygen saturation showed statistically significant differences between two groups. There was no difference in bony mass index (BMI). CONCLUSION: Upper airway pressure measurement can be a method to evaluate the upper airway obstruction site. This study shows that OSA patients with multisite obstruction have severer sleep apnea than those with single site obstruction.
Airway Obstruction ; Apnea ; Catheters ; Epiglottis ; Esophagus ; Humans ; Nasal Cavity ; Oxygen ; Polysomnography ; Sleep Apnea Syndromes ; Sleep Apnea, Obstructive* ; Uvula

Sleep-disordered breathing in children can include habitual snoring, obstructive hypoventilation, upper airway resistance syndrome, and obstructive sleep apnea. Obstructive hypoventilation in children is characterized by CO₂ retention caused by prolonged partial upper airway obstruction during sleep. To date, there have been few studies regarding the clinical significance and management strategies in pediatric obstructive hypoventilation, although it is a unique feature of pediatric sleep-disordered breathing. In this report, we describe two cases of obstructive hypoventilation that demonstrated improvement following upper airway surgery. These results suggest that upper airway surgery could be an additional treatment modality in obstructive hypoventilation.
Airway Obstruction ; Airway Resistance ; Child ; Humans ; Hypoventilation* ; Sleep Apnea Syndromes ; Sleep Apnea, Obstructive ; Snoring

BACKGROUND: Sleep-related breathing disorders are commonly found in patients with chronic renal failure and particularly, sleep apnea may have an influence on the long-term mortality rates in these pa tients. Maintenance hemodialysis is the mainstay of medical measures for correcting the metabolic derangements of chronic renal failure but it is uncertain whether it may alleviate sleep disorders including sleep apnea. METHODS: Forty seven patients on maintenance hemodialysis were surveyed with the sleep questionnaire about their clinical symptoms related to sleep disorders. Among them, 15 patients underwent the polysomnography and their blood levels of urea nitrogen, creatinine, electrolytes and the arterial blood gases in the nights before and following hemodialysis were measured. RESULTS: Forty (85.1%) of the 47 patients complained of the symptoms associated with sleep-wake cycle disturbances, 55.3% experienced snoring and 27.7% reported witnessed apneas. The duration of REM sleep increased significantly in the nights after hemodialysis compared to the nights without hemodialysis (p<0.05) and the percentage of total sleep time comprising NREM sleep decreased significantly in the nights following hemodialysis compared to the nights before hemodialysis (p<0.05). The percentage of total sleep time consisting of the stage 1 and 2 NREM sleep showed the trend for a decrease in the nights after hemodialysis (p=0.051), while the percentage of total sleep time comprising the stage 3 and 4 NREM sleep did not change between nights. Tne obstructive sleep apnea was more predominant type than the central one in both nights and there were no differences in the apnea index and the apnea-hypopnea index between the nights. The decrease in the blood level of urae nitrogen, creatinine, potassium and phoshorus was observed after hemodialysis (p<0.05), but the differences of paramenters measured during polysomnography between the nights did not correlate with the changes of biochemical factors obtained on the two night. Arterial blood gas analysis showed that pH was significantly greater in the nights after hemodialysis than in the nights before hemodialysis (p<0.05), but there were no correlations between the parameters examined during polysomnography and the parameters of arterial blood gas anslysis (p<0.05). CONCLUSION: These results suggest that chronic renal failure is an important systemic disorder which is strongly associated with sleep disorders. Maintenance hemodialysis, although it is a widely accepted measure to treat chronic renal failre, did not significantly modulate the sleep architecture and the severity of sleep apnea. Thus, taking the patients with chronic renal failure into account, it is advisable to try not only to find a substantial way for correcting metabolic derangements but also to consider the institution of more effective treatments for sleep disorders.
Apnea ; Blood Gas Analysis ; Creatinine ; Electrolytes ; Gases ; Humans ; Hydrogen-Ion Concentration ; Kidney Failure, Chronic* ; Mortality ; Nitrogen ; Polysomnography ; Potassium ; Surveys and Questionnaires ; Renal Dialysis* ; Respiration ; Sleep Apnea Syndromes* ; Sleep Apnea, Obstructive ; Sleep Wake Disorders ; Sleep, REM ; Snoring ; Urea

Obesity, with an increasing prevalence,has become one of the most common metabolic diseases. Obesity is associated with many respiratory diseases, especially sleep-related breathing disorders including obstructive sleep apnea-hypopnea syndrome, obesity hypoventilation syndrome, and overlap syndrome. This article reviews the association between obesity and these sleep-related breathing disorders.
Humans ; Obesity ; complications ; Obesity Hypoventilation Syndrome ; etiology ; Pulmonary Disease, Chronic Obstructive ; complications ; Sleep Apnea, Obstructive ; etiology

Obesity-Hypoventilation syndrome (OHS) is characterized by morbid obesity, hypoxia, and hypercapnea during wakefulness without parechymal lung disease or severe obstructive sleep apnea. A woman was admitted because of mental deterioration and diagnosed as OHS on the basis of obesity and hypoventilation, while awake, after ruling out other causes. By bilevel positive airway pressure (BiPAP) therapy, hypercapnea and hypoxia were resolved. We report that BiPAP can be an effective treatment for severe hypercapnea and hypoxia in OHS, which obviate the need for invasive endotracheal intubation.
Anoxia ; Female ; Humans ; Hypoventilation ; Intubation, Intratracheal ; Lung Diseases ; Obesity ; Obesity Hypoventilation Syndrome* ; Obesity, Morbid ; Sleep Apnea, Obstructive ; Wakefulness