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More Breast Cancers Detected Using Ultrasound - But More False Positives Too
A standardized technique for using ultrasound technology to search for tiny, invasive tumors has proven to be an effective addition to traditional mammography screening. However, the method produces a higher percentage of false positives as well, which raises some questions as to its value as a routine procedure..
Chinese Government Works to Contain Lethal Virus Outbreak
Thousands of children have been infected by a virus sweeping through China, sparking fears that the upcoming Olympic Games might be jeopardized. However, the World Health Organization has said that it's unlikely the outbreak would have any impact on the games. Enterovirus 71, a type of hand, foot and mouth disease, has already claimed 25 lives. WHO also dismissed speculation that Chinese officials had attempted to suppress reports of the outbreak..
Heparin Fiasco Exposes Deep Crevasses in Drug Safety Regulation
The latest revelation in the heparin horror story is that the adulteration of the drug that resulted in at least 81 deaths in the U.S. may have been deliberate. What is known is that a substantial amount of a cheap chemical -- oversulfated chondroitin sulfate -- was substituted for heparin in some batches manufactured for
Baxter International (http://www.baxter.com/)..
Medical Ghostwriting Revelations Touch Off Ethics Debate
The latest insult piled onto all the injury inflicted by the Vioxx debacle is disclosed in an article published by the
Journal of the American Medical Association (http://www.jama.com) last week: Much of the research backing up manufacturer Merck's claims about the drug was ghostwritten by writers in Merck's employ and then rubber-stamped by medical professionals who had little or not involvement in the studies but were willing to attach their names as authors nonetheless..
Smoking, Drinking Linked to Early Alzheimer's Onset
People who consume more than two alcoholic beverages and smoke a pack or more of cigarettes a day are likely to develop Alzheimer's disease years earlier than their counterparts who drink and smoke less -- or not at all, a new study suggests. Researchers also identified a gene associated with earlier onset of the disease. Heavy drinkers and smokers who carry the gene are at even greater risk than those who do not..
Canada First Country to Ban Baby Bottles Containing BPA
The Canadian government has decided to ban the use of plastics containing the chemical bisphenol A for baby bottles. In explaining the move, Health Minister Tony Clement said that newborns and infants need a higher safety margin to protect against any possible negative effects of the substance. In addition, the company Nalgene, which makes water bottles out of clear, hard plastic, said it would phase out production of products containing bisphenol A..
Scientists Discover Gene Link Between Nicotine, Smoking, Lung Cancer
In three separate studies, researchers have identified two hereditary genes that predispose former and current smokers to higher risk of lung cancer, a finding that might help in making earlier diagnoses, when treatments are most effective. The genes also make it more likely for people to become addicted to nicotine -- a "double-whammy," according to the author of one of the studies..
Researchers: Managing Worry, Stress, Anxiety Can Reduce Heart Risk
Stress and anxiety are significant contributors to heart disease, reported researchers at a conference in Chicago. Finding ways to reduce stress and worry can cut the risk of heart attack or stroke by as much as 60 percent, according to their findings. Although this is not the first study to establish a link between stress and heart ailments it is the first one that looks at the effects of treating anxiety or depression on cardiovascular risk factors..
Study: Muscle-Building HGH May Actually Diminish Athletic Performance
Athletes may be risking more than their reputations and their health by using banned synthetic human growth hormone to bulk up. Ironically, they may also be running the risk of worsening their athletic performance -- decidedly not the outcome they hope for or expect. Though there's no doubt the substance helps to add muscle mass, researchers found that it might reduce stamina in those who took it..
Weight Loss Crucial for Obese, Insulin-Resistant Type-2 Diabetics
For patients with insulin-resistant type 2 diabetes, losing weight and making lifestyle changes is likely to work better than intensive insulin therapy, which may actually be harmful, suggests an article published in the
Journal of the American Medical Association..
Family Awarded Compensation in Case Linking Vaccines to Autism
The family of a girl who developed autism after receiving nine doses of vaccines in a single day has been awarded compensation under the National Vaccine Injury Compensation Program. Though there has been controversy over whether vaccines may contribute to the development of autism for several years, the U.S. government continues to maintain its stance that there is no evidence to support such a link and says all children should receive the recommended immunizations..
Vitamin E Implicated as Lung Cancer Risk Factor
Vitamin E supplements may heighten the risk of lung cancer, suggests new research published in the
Journal of Respiratory and Critical Care Medicine (http://ajrccm.atsjournals.org/). While connections between lung cancer and such factors as smoking and family history were expected, the researchers were surprised to note a statistically significant association with vitamin E supplementation and occurrence of the disease..
Daily 30-Minute Walk May Lower Stroke Risk
For both men and women, working just a moderate amount of exercise into their daily routines -- say 30 minutes of energetic walking -- may lower the possibility of suffering a stroke by as much as 40 percent, suggests new research involving approximately 60,000 participants..
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Erectile dysfunction
Erectile dysfunction (ED) affects the lives of many middle-aged men and their partners. The term erectile dysfunction covers a range of disorders, but usually refers to the inability to obtain an adequate erection for satisfactory sexual activity.
Although erectile dysfunction, formerly called impotence, is more common in men older than 65, it can occur at any age. An occasional episode of erectile dysfunction happens to most men and is normal. As men age, it's also normal to experience changes in erectile function. Erections may take longer to develop, may not be as rigid or may require more direct stimulation to be achieved. Men may also notice that orgasms are less intense, the volume of ejaculate is reduced and recovery time increases between erections. Erectile dysfunction may also be a sign of a physical or emotional problem that requires treatment.
Erectile dysfunction was once a taboo subject, but more men are seeking help. Doctors are gaining a better understanding of what causes erectile dysfunction and are finding new and better treatments.
This Website discusses all about erectile dysfunction, physiology of the normal erection and the pathophysiology, and treatment of ED.
What is Erectile Dysfunction?
Erectile dysfunction or impotence is a sexual dysfunction characterized by the inability to develop or maintain an erection of the penis for satisfactory sexual intercourse regardless of the capability of ejaculation. There are various underlying causes, such as diabetes, many of which are medically reversible.
The causes may be physiological or psychological. Psychological impotence can often be helped by almost anything that the patient believes in; there is a very strong placebo effect.
Due to its embarrassing nature and the shame felt by sufferers, the subject was taboo for a long time, and is the subject of many urban legends. Folk remedies have long been advocated, with some being advertised widely since the 1930s. The introduction of perhaps the first pharmacologically effective remedy for impotence, sildenafil (trade name Viagra), in the 1990s caused a wave of public attention, propelled in part by the news-worthiness of stories about it and heavy advertising.
The Latin term impotentia coeundi describes simple inability to insert the penis into the vagina. It is now mostly replaced by more precise terms.
Signs and symptoms:
Erectile dysfunction is characterized by the inability to maintain erection. Normal erections during sleep and in the early morning suggest a psychogenic cause, while loss of these erections may signify underlying disease, often cardiovascular in origin. Other things leading to erectile dysfunction are diabetes mellitus (causing neuropathy) or hypogonadism (decreased testosterone levels due to disease affecting the testicles or the pituitary gland).
Here are some causes of Erectile Dysfunction:
* Arousal: The first step is sexual arousal, which men obtain from the senses of sight, touch, hearing and smell, and from thoughts.
* Nervous system response: The brain communicates the sexual excitation to the body's nervous system, which activates increased blood flow to the penis.
* Blood vessel response:. A relaxing action occurs in the blood vessels that supply the penis, allowing more blood to flow into the shafts that produce the erection.
Physiology of normal erections:
Penile erections involve an integration of complex physiologic processes involving the CNS, peripheral nervous system, and hormonal and vascular systems. Any abnormality involving these systems, whether from medication or disease, has a significant impact on the ability to develop and sustain an erection, ejaculate, and experience orgasm. Tumescence, the vascular filling of the cavernous bodies, relies on neural and hormonal mechanisms operating at various levels of the neural axis. This is unique among visceral functions because it requires central neurological input.
Andersson et al summarized some of the information related to the pathways involved in erectile function. The degree of contraction of corpus cavernosal smooth muscle determines the functional state of the penis. The balance between contraction and relaxation is controlled by central and peripheral factors that involve many transmitters and transmitter systems. At the cellular level, smooth muscle relaxation occurs following the release of acetylcholine from the parasympathetic nerves.
Pathophysiology of erectile dysfunction:
Erectile Dysfunction is essentially a vascular disease. It is often associated with other vascular diseases and conditions such as diabetes, hypertension, and coronary artery disease. Other conditions associated with Erectile Dysfunction include neurologic disorders, endocrinopathies, benign prostatic hyperplasia, and depression. Conditions associated with reduced nerve and endothelium function, such as aging, hypertension, smoking, hypercholesterolemia, and diabetes, alter the balance between contraction and relaxation factors. These conditions cause circulatory and structural changes in penile tissues, resulting in arterial insufficiency and defective smooth muscle relaxation. In some patients, sexual dysfunction may be the presenting symptom of these disorders.
Treatment:
Sildenafil Citrate is the way to treat Erectile Dysfunction. Generic Viagra contains sildenafil citrate and contains same ingredients like branded drug.
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