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Individuals weighing greater than 100 kg represent a small fraction of the population and yet pose a major health risk to themselves. It is proposed that individuals be classified according to their body mass index (BMI). Class 0 individuals have a BMI of 20-25 kg/m2 and are not obese; Class I individuals have a BMI of 25-30 kg/m2 and are at low risk from their obesity; Class II individuals have a BMI of 30-35 kg/m2 and have moderate risk; Class III individuals have a BMI of 35-40 kg/m2 and have high risk associated with their obesity; Class IV individuals have a BMI of greater than 40 kg/m2 and are at very high risk for illness. Class IV is the primary group for surgical consideration. The pathophysiologic consequences of excess weight result in large part from increased food intake and/or decreased physical activity. Individuals in Class IV have additional problems related to their weight, including cardiomyopathy, Pickwickian/sleep apnea syndrome, pituitary/gonadal dysfunction, acanthosis nigricans, and significant osteoarthritis.
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PMID:Pathophysiology of obesity. 173 17

The health risks of obesity increase with its severity and reach significance at a weight greater than 20% above optimal, by using life insurance tables, or at a body mass index greater than 27. Risks include hypertension, insulin resistance and diabetes mellitus, cardiovascular disease, hypertriglyceridemia, low high-density-lipoprotein cholesterol, and, in some studies, high total-and low-density-lipoprotein cholesterol. There is an increased mortality from endometrial cancer in women and from colorectal cancer in men. Chronic hypoxia and hypercapnia, sleep apnea, gout, and degenerative joint disease can occur with more severe obesity. The distribution of body fat is directly related to these health risks. Abdominal obesity is more dangerous than gluteal-femoral obesity because the amount of intraabdominal fat seems to determine much of the increased peril; therefore, risks of cardiovascular disease, stroke, hypertension, and diabetes increase with abdominal obesity, even independently of total fat mass.
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PMID:Health implications of obesity. 203 92

A personal series of 256 cases of acromegaly/gigantism seen over a 20-year period from 1963 is described. The insidious nature of the condition resulted in delay in diagnosis which was often made by a doctor when seeing the patient for an unrelated problem. Other features which commonly led to the diagnosis being made were headache, change in appearance, carpal tunnel syndrome, amenorrhoea and diabetes. The Hardy system for grading the radiological appearance of the pituitary tumour was used. Widely invasive tumours were not common but tended to occur in patients with younger age of onset and high GH levels. The occurrence of various symptoms and clinical features was noted and the changes resulting from reducing the GH level to normal. The incidence of hypertension, but not of coronary artery disease, is increased and the blood pressure may be reduced following successful treatment. The effects on the upper and lower respiratory tract are reported as well as sleep apnoea and problems associated with anaesthesia. Skin manifestations included sweating, pigmented skin tags, acanthosis nigricans and cutis verticis gyrata. In the skeletal system the incidence of kyphoscoliosis and osteoarthritis especially of the hip is reported: the question of hip replacement is discussed. Diabetes mellitus disappeared in most cases if the acromegaly was cured. In men but not in women the incidence of colloid nodular goitre was increased as was hyperthyroidism in middle-aged women. In two patients a parathyroid adenoma was present: hypercalcaemia was present in five additional patients, but the cause was not determined. The common occurrence of amenorrhoea in the younger women was noted, it was not always associated with hyperprolactinaemia, and often responded to successful treatment of the acromegaly. The association of acromegaly with hirsutism and galactorrhoea is confirmed. The incidence of impotence and loss of libid in the men is discussed: in a proportion of those in whom the acromegaly was cured, potency returned, but in a number depression occurred and what was believed to be psychogenic impotence persisted. Hyperprolactinaemia was found in 49 out of 151 patients with active acromegaly in whom the prolactin level was measured. Previous reports have indicated a doubling of death rates in acromegalics. In this series there were 47 deaths observed compared to 37.2 expected. The increased death rate was in women of all ages and in men under the age of 55, The increased deaths in the women were from cardiovascular and cerebrovascular causes and from breast cancer.(ABSTRACT TRUNCATED AT 400 WORDS)
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PMID:Acromegaly. 330 90

Patients selected for gastroplasty should be at least 45 kg above ideal weight, between the ages of 18 and 50, and operated on in a center with good results, where team assessment and long-term follow-up is emphasized. Referral by a family doctor who provides local care and support is important. Medical complications need not be present because the idea is to prevent them, but problems such as sleep apnea, adult onset diabetes mellitus, hypertension, osteoarthritis, and infertility, which may be corrected by weight loss, increase the indication for gastroplasty. Patients should have social support and be intelligent enough to understand the postoperative diet and the need for regular follow-up. Those with a history of psychiatric admission require careful preoperative assessment by psychiatrist or psychologist and close follow-up and support. Patients should have made a good supervised attempt at dieting, have had stable weight for 3 to 5 years preoperatively, and have stopped smoking at least 6 weeks prior to operation. Tests to assess personality factors, eating habits, and motivation are developing, but more precise methods of selecting patients for gastroplasty and predicting successful and uncomplicated weight loss are still needed.
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PMID:Patient selection for obesity surgery. 332 22

A cross-sectional study of 1385 Saudi females attending 15 health centres in urban and rural areas in the Riyadh region was conducted during September and October 1992 to determine the prevalence of obesity and its associated factors. The mean age was 32.2 +/- 11.7 years and body mass index (BMI) 29.2 +/- 7.0 kg m-2. Only 26.1% of subjects were their ideal weight (BMI < 25 kg m-2), while 26.8% were overweight (BMI 25-29.9 kg m-2), 41.9% were moderately obese (BMI 30-40 kg m-2) and 5.1% were morbidly obese (BMI > 40 kg m-2). High-risk groups for obesity were mostly middle aged, multiparous housewives. Patients living in rural areas had greater BMIs than those living in urban areas (P < 0.01). Thirty per cent of overweight participants did not think they were overweight. The study emphasizes the need for community based programmes for preventing and reducing obesity since weight control is effective in ameliorating most of the disorders associated with obesity such as Type 2 non-insulin dependent diabetes mellitus, hypertension, stroke, heart disease, sleep apnoea syndrome and osteoarthritis of the knees. The focus of efforts should be directed towards young mothers who are at risk of developing obesity and who play a central role in perpetuating it in their offspring.
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PMID:High prevalence of clinical obesity among Saudi females: a prospective, cross-sectional study in the Riyadh region. 800 60

The medical hazards of obesity are discussed. Risks include insulin resistance, diabetes mellitus, hypertriglyceridemia, decreased levels of high-density lipoprotein cholesterol, and increased levels of low-density lipoprotein cholesterol. Obesity is also associated with gallbladder disease and some forms of cancer as well as sleep apnea, chronic hypoxia and hypercapnia, and degenerative joint disease. Obesity is an independent risk factor for death from coronary heart disease. A central distribution of body fat enhances the risk for most of these conditions.
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PMID:Medical hazards of obesity. 836 92

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

The United States is experiencing an epidemic of obesity among both adults and children. Approximately 35 percent of women and 31 percent of men age 20 and older are considered obese, as are about one-quarter of children and adolescents. While government health goals for the year 2000 call for no more than 20 percent of adults and 15 percent of adolescents to be obese, the prevalence of this often disabling disease is increasing rather than decreasing. Obesity, of course, is not increasing because people are consciously trying to gain weight. In fact, tens of millions of people in this country are dieting at any one time; they and many others are struggling to manage their weight to improve their appearance, feel better, and be healthier. Many programs and services exist to help individuals achieve weight control. But the limited studies paint a grim picture: those who complete weight-loss programs lose approximately 10 percent of their body weight, only to regain two-thirds of it back within 1 year and almost all of it back within 5 years. These figures point to the fact that obesity is one of the most pervasive public health problems in this country, a complex, multifactorial disease of appetite regulation and energy metabolism involving genetics, physiology, biochemistry, and the neurosciences, as well as environmental, psychosocial, and cultural factors. Unfortunately, the lay public and health-care providers, as well as insurance companies, often view it simply as a problem of willful misconduct--eating too much and exercising too little. Obesity is a remarkable disease in terms of the effort required by an individual for its management and the extent of discrimination its victims suffer. While people often wish to lose weight for the sake of their appearance, public health concerns about obesity relate to this disease's link to numerous chronic diseases that can lead to premature illness and death. The scientific evidence summarized in Chapter 2 suggests strongly that obese individuals who lose even relatively small amounts of weight are likely to decrease their blood pressure (and thereby the risk of hypertension), reduce abnormally high levels of blood glucose (associated with diabetes), bring blood concentrations of cholesterol and triglycerides (associated with cardiovascular disease) down to more desirable levels, reduce sleep apnea, decrease their risk of osteoarthritis of the weight-bearing joints and depression, and increase self-esteem. In many cases, the obese person who loses weight finds that an accompanying comorbidity is improved, its progression is slowed, or the symptoms disappear. Healthy weights are generally associated with a body mass index (BMI; a measure of whether weight is appropriate for height, measured in kg/m2) of 19-25 in those 19-34 years of age and 21-27 in those 35 years of age and older. Beyond these ranges, health risks increase as BMI increases. Health risks also increase with excess abdominal/visceral fat (as estimated by a waist-hip ratio [WHR] > 1.0 for males and > 0.8 for females), high blood pressure (> 140/90), dyslipidemias (total cholesterol and triglyceride concentrations of > 200 and > 225 mg/dl, respectively), non-insulin-dependent diabetes mellitus, and a family history of premature death due to cardiovascular disease (e.g., parent, grandparent, sibling, uncle, or aunt dying before age 50). Weight loss usually improves the management of obesity-related comorbidities or decreases the risks of their development. The high prevalence of obesity in the United States together with its link to numerous chronic diseases leads to the conclusion that this disease is responsible for a substantial proportion of total health-care costs. We estimate that today's health-care costs of obesity exceed $70 billion per year.(ABSTRACT TRUNCATED AT 400 WORDS)
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PMID:Weighing the options: criteria for evaluating weight-management programs. The Committee to Develop Criteria for Evaluating the Outcomes of Approaches to Prevent and Treat Obesity. 865 36

The effect of weight loss with anorectic medications on sleep apnea, non-insulin-dependent diabetes, and steatohepatitis is illustrated in three cases from practice in a clinical nutrition setting. Prevention of obesity, a chronic disorder, is preferable, but when obesity becomes a major obstacle in the care of patients with respiratory, cardiovascular, and metabolic disorders and osteoarthritis, an intense course of weight reduction using anorectic medications under medical and dietetic guidance is essential for patients' survival and reduction of medical cost.
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PMID:Three cases of comprehensive dietary therapy and pharmacotherapy of patients with complex obesity-related diseases. 928 79

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


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