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Query: UMLS:C0037315 (sleep apnea)
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Weight loss reduces many of the health hazards associated with obesity including insulin resistance, diabetes mellitus, hypertension, dyslipidemia, sleep apnea, hypoxemia and hypercarbia, and osteoarthritis. Potential adverse effects of weight loss include a greater risk for gallstone formation and cholecystitis, excessive loss of lean body mass, water and electrolyte problems, mild liver dysfunction, and elevated uric acid levels. Less consequential problems such as diarrhea, constipation, hair loss, and cold intolerance may also occur. The short-term adverse effects are not severe enough to contraindicate weight loss, nor do they outweigh its short-term benefits.
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PMID:Short-term medical benefits and adverse effects of weight loss. 836 5

An estimated 97 million adults in the United States are overweight or obese, a condition that substantially raises their risk of morbidity from hypertension, dyslipidemia, type 2 diabetes, coronary heart disease, stroke, gallbladder disease, osteoarthritis, sleep apnea and respiratory problems, and endometrial, breast, prostate, and colon cancers. Higher body weights are also associated with increases in all-cause mortality. Obese individuals may also suffer from social stigmatization and discrimination. As a major contributor to preventive death in the United States today, overweight and obesity pose a major public health challenge.
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PMID:Executive summary of the clinical guidelines on the identification, evaluation, and treatment of overweight and obesity in adults. 975 81

Obese patients are at an increased risk for developing many medical problems, including insulin resistance and type 2 diabetes mellitus, hypertension, dyslipidemia, cardiovascular disease, stroke, sleep apnea, gallbladder disease, hyperuricemia and gout, and osteoarthritis. Certain cancers are also associated with obesity, including colorectal and prostate cancer in men and endometrial, breast, and gallbladder cancer in women (1-6). Excess body weight is also associated with substantial increases in mortality from all causes, in particular, cardiovascular disease. More than 5% of the national health expenditure in the United States is directed at medical costs associated with obesity (7). In addition, certain psychologic problems, including binge-eating disorder and depression, are more common among obese persons than they are in the general population (8.9). Finally, obese individuals may suffer from social stigmatization and discrimination, and severely obese people may experience greater risk of impaired psychosocial and physical functioning, causing a negative impact on their quality of life (10).
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PMID:Obesity and its comorbid conditions. 1069 82

Insulin resistance appears to be a common feature and a possible contributing factor to several frequent health problems, including type 2 diabetes mellitus, polycystic ovary disease, dyslipidemia, hypertension, cardiovascular disease, sleep apnea, certain hormone-sensitive cancers, and obesity. Modifiable factors thought to contribute to insulin resistance include diet, exercise, smoking, and stress. Lifestyle intervention to address these factors appears to be a critical component of any therapeutic approach. The role of nutritional and botanical substances in the management of insulin resistance requires further elaboration; however, available information suggests some substances are capable of positively influencing insulin resistance. Minerals such as magnesium, calcium, potassium, zinc, chromium, and vanadium appear to have associations with insulin resistance or its management. Amino acids, including L-carnitine, taurine, and L-arginine, might also play a role in the reversal of insulin resistance. Other nutrients, including glutathione, coenzyme Q10, and lipoic acid, also appear to have therapeutic potential. Research on herbal medicines for the treatment of insulin resistance is limited; however, silymarin produced positive results in diabetic patients with alcoholic cirrhosis, and Inula racemosa potentiated insulin sensitivity in an animal model.
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PMID:Insulin resistance: lifestyle and nutritional interventions. 1076 68

Cardiovascular disease is the leading cause of morbidity and mortality in end-stage renal disease. Causes include those usually found in the general population, those related to the uremic status, and those related to dialytic treatment. Hypertension, hypotension, anemia, hypoalbuminemia, malnutrition, dyslipidemia, reactive C protein, calcium-phosphate product, dialysis modalities, and hyperhomocysteinemia are discussed extensively. Special emphasis is put on hyperparathyroidism as a traditional toxin. The emergent role of sleep apnea has been confirmed in animal models as well as in humans studied using polysomnography. There are difficulties in diagnosing coronary disease, because angiography is not risk-free, is expensive, and should be reserved for patients having symptoms of heart failure and/or patients having diabetes mellitus, and/or patients entering a transplantation list. This allows patients with coronary disease to undergo coronary artery bypass (preferably) or percutaneous transluminal angioplasty. Patients for whom surgery is not appropriate should be treated using more traditional medical procedures.
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PMID:The heart in uremia: role of hypertension, hypotension, and sleep apnea. 1157 20

Obesity is associated with a number of medical conditions that lead to increased morbidity and increased mortality. Both the National Institutes of Health and the World Health Organization define obesity as a body mass index (BMI) > or = 30 kg/m2 and overweight as a BMI 25-30. The most common conditions associated with obesity are insulin resistance, diabetes mellitus, hypertension, dyslipidemia, cardiovascular disease, gallstones and cholecystitis, sleep apnea and other respiratory dysfunction, and the increased incidence of certain cancers. These are discussed below.
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PMID:The medical risks of obesity. 1196 7

Possibly the most important outcomes of bariatric surgery involve changes in obesity-related illness, quality of life (QOL), and psychologic well-being. Dramatic improvement or resolution of serious medical comorbidity accompanies the weight loss following laparoscopic adjustable gastric banding with the LAP-BAND (INAMED Health, Santa Barbara, CA). There are major improvements in the conditions of the metabolic syndrome, which is characterized by impaired glucose tolerance, dyslipidemia, and hypertension. Improvement in insulin sensitivity and pancreatic beta-cell function associated with weight loss induces remission in the majority of type 2 diabetics and reduces the risk of others developing type 2 diabetes. Improvement in dyslipidemia is characterized by raised high-density lipoprotein cholesterol and lower triglyceride concentrations. Together with lower blood pressure, these changes provide a substantial reduction in cardiovascular risk. Other medical conditions caused or aggravated by obesity are also significantly improved, including sleep apnea, daytime sleepiness, asthma, and gastroesophageal reflux. Weight loss is associated with improved fertility and more favorable pregnancy outcomes. All aspects of QOL improve substantially, especially physical disability, and post-weight-loss QOL measures approximate those of the general population. There are also major improvements in body image and reduction in depressive illness. These changes provide perhaps the most compelling data regarding the value of LAP-BAND surgery and underlie the great satisfaction experienced by patients.
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PMID:Changes in comorbidities and improvements in quality of life after LAP-BAND placement. 1252 52

Stroke is the 3rd leading cause of death and a major cause of serious long-term disability in the United States. There are several well established and modifiable risk factors for the development of stroke. These include arterial hypertension, cardiac disease, dyslipidemia, diabetes mellitus and smoking among others. Sleep apnea has been found at alarmingly high rates (>50%) in patients with acute stroke as well as after neurologic recovery leading some to speculate that sleep apnea had been present prior to stroke. Sleep apnea is highly prevalent in the general population with a frequency of 2% to 4%. Sleep apnea is associated with high incidence of obesity, coronary artery disease and hypertension. There are several hematologic and hemodynamic changes in sleep apnea that can play significant roles in the pathogenesis of stroke. In this review, the author provides a critical analysis of the association between sleep apnea and stroke. There is convincing evidence to believe that sleep apnea is a modifiable risk factor for stroke, however, prospective studies are needed to establish the cause-and-effect relationship. Stroke and sleep-related breathing disorders are both common and are associated with significant morbidity and mortality. Several recent large epidemiological studies have shown a strong association between these 2 disorders independent of known risk factors for stroke. Understanding the link between obstructive sleep apnea and stroke may provide a novel preventative and therapeutic approach in the management of stroke.
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PMID:Is sleep apnea a risk factor for stroke? A critical analysis. 1533 43

Previous studies have shown a peak occurrence of ischemic stroke in the morning but no consistent finding has been attributed to this. Focused on lacunar strokes we performed a prospective study with a detailed diagnostic protocol including parameters of recent infection, indicators of sleep apnea and cerebral vasoreactivity (CVR), aimed at defining differences in risk profiles between diurnal and nocturnal strokes. Consecutively we included 33 nocturnal and 54 diurnal strokes. Baseline characteristics, known risk factors, stroke severity and topology were not different between groups. The mean low-density lipoprotein (LDL) cholesterol level was significantly higher amongst patients with nocturnal strokes (133.3 +/- 35.2 mg/dl vs. 115.5 +/- 39.8 mg/dl; P = 0.04), as well as the proportion of patients with any dyslipidemia (94% vs. 77.8%; P = 0.047). Twenty-four-hour blood pressure recordings showed a reduced nocturnal decrease of blood pressure in subjects with strokes that occurred between 10 pm and 6 am in comparison with those whose strokes occurred between 6 am and 2 pm (5.0 +/- 7.3% vs. 11.0 +/- 6.7%; P = 0.049). No significant differences were found for parameters of recent infection (including seroreactivity against Chlamydia pneumoniae and cytomegalovirus), CVR, indicators of sleep apnea and the degree of white matter disease assessed by magnetic resonance tomography. Dyslipidemia, especially elevated LDL cholesterol is more prevalent in nocturnal lacunar strokes especially when combined with a reduced nocturnal dipping of blood pressure. This risk factor profile can be regarded as an additional target for stroke prevention.
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PMID:Dyslipidemia, elevated LDL cholesterol and reduced nocturnal blood pressure dipping denote lacunar strokes occurring during nighttime. 1552 95

The prevalence of overweight and obesity is increasing worldwide. During the last two decades, the prevalence of adults in the higher body mass index (BMI) categories in the US has increased the most, as much as 300% for those with a BMI above 40kg/m2. In children and adolescents, a doubling of the prevalence of severe overweight poses a serious health risk to future generations of young adults who may develop chronic diseases normally associated with aging. The simple definition of obesity, an imbalance between energy intake and energy expenditure, ignores the complexity of, and largely unknown interactions between, genes, food intake and physical activity, which together determine bodyweight and fat distribution. Although the etiology and manifestations of overweight and obesity are complex, the assessment of overweight and obesity requires only an accurate measurement of bodyweight, height and abdominal circumference, as well as a history and physical examination attuned to the morbidities that commonly accompany overweight and obesity such as diabetes mellitus, hypertension, dyslipidemia and sleep apnea. The treatment of patients with overweight and obesity continues to be based on changes to diet and physical activity. Simple behavior modification techniques are within the reach of busy clinicians. The additional use of available bodyweight reduction medications can reliably lead to a 5 to 10% reduction from initial bodyweight, a loss that has been shown to provide significant health benefit. The use of meal replacements has also been shown to be effective and is probably an under-appreciated treatment resource. Surgery is the most successful treatment for those with severe obesity and should be discussed as an option for those in the appropriate bodyweight categories. Because societal trends favor the greater intake of calorie-dense foods and less physical activity to accomplish the activities of daily life, the future of obesity treatment will require the development of bodyweight reduction medications that work by a variety of mechanisms to decrease food intake or increase energy expenditure. Such medications should not be viewed as a 'crutch' but rather as a 'helping hand' that enable people to better adhere to a healthier lifestyle.
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PMID:Strategies for the management of patients with obesity. 1576 18


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