Andrew Smith

A review of research conducted over the past 75 years finds no definitive answers about the link between testosterone supplements and cardiovascular health, but it does find far more evidence of benefit than harm.

Study results that may soon trigger sweeping changes to pediatric nutrition guidelines indicate that sustained consumption of peanuts over the first 5 years of life dramatically lowers the risk of peanut allergies, even among high-risk children who begin with mild sensitivity to peanuts.

A simple CHADS2 score, along with records about ongoing use of certain medications, may help physicians predict the risk that individual patients will develop atrial fibrillation after thoracic or vascular surgery.

Study results indicate that the extent of a patient's physical recovery from celiac disease does not affect that patient's long-term risk of developing atrial fibrillation or ischemic heart disease.

Study results show that continuous cardiac monitoring is an effective (and cost-effective) option for detecting atrial fibrillation in stroke patients.

Researchers from Australia believe the bacteria in yogurt can help alleviate the food allergy that's most likely to cause anaphylaxis, but other experts want more evidence.

New research suggests that low testosterone levels in older men are less likely to lead to cardiovascular disease than a sign of underlying problems that are the real cause.

A team from MedUni Vienna has demonstrated that testosterone increases the number of proteins that transport serotonin into the brain.

Results from a recent survey indicate that efforts to educate American doctors about the diagnosis and treatment of anaphylaxis have achieved mixed results.

A paper from a pair of physicists may reveal significant new information about the causes of atrial fibrillation and help to make cardiac ablations a more effective treatment for the condition.

A novel oral anticoagulant's trial performance has led European regulators to approve its use in cardioversion for patients with atrial fibrillation.

An analysis of medical records from 5,311 people indicates that even mildly elevated blood pressure may indicate a dramatically elevated risk of developing atrial fibrillation (AF). Many studies have shown that patients with hypertension - defined as blood pressure above 140/90 mm Hg - are more likely to develop AF than patients with healthy blood pressure, but the new paper may be the first to document a significant association between AF and blood pressure between 120/80 mm Hg and 139/89 mm Hg.

New research suggests that strategically timed injections of testosterone may significantly extend the lives of some men with prostate cancer. Doctors at Johns Hopkins Kimmel Cancer Center provided such injections (along with 14 days of the oral chemotherapy etoposide) to 16 men whose tumors had become resistant to androgen deprivation therapy (ADT). A pair of those patients experienced side effects and dropped out of the study. The rest received at least 2 more 400 mg injections, spaced at 28-day intervals, while they kept taking chemicals designed to suppress natural androgen production.

Aterica Digital Health, based in Waterloo, Canada, has designed an EpiPen case that's difficult to lose or leave behind.The "Veta smart case" uses sensors, Bluetooth radios and other technology to broadcast its location and perform several other tricks that could help users survive anaphylaxis. The case itself works with an app that runs on either Apple iOS or Google Android. Whenever a user's smartphone and case get too far apart to communicate, an alert appears on the phone. If a user misplaces a case, the app can reveal its exact location by tracking the signal it emits.

Sean Parker, the entrepreneur who founded Napster and secured Facebook some of its first venture capital money, recently donated $24 million to fund an allergy research center at Stanford University.

New research indicates that an over-the-counter supplement doesn't raise testosterone levels but a widely used class of prescription drug may lower them.

Four separate cases of fatal anaphylaxis, all within days of each other, vividly illustrate both the extreme difficulty of avoiding known food allergens and the potential consequences of any given exposure.

A new analysis of several prospective health studies indicates that low testosterone levels at any age are associated with an increased risk ischemic stroke in men.

A new study indicates that left atria enlargement after catheter ablation for paroxysmal atrial fibrillation (AF) increases the risk that the condition will recur after a second ablation.

A new analysis of nearly 800 patient records has found an association between the oral anticoagulants used to treat atrial fibrillation and cerebral microbleeds.

Allergists have long known that women are more likely than men to suffer severe allergic reactions such as anaphylaxis, but a new study may finally explain why.

A new study finds that low testosterone levels are associated with frailty and other health problems in men with Human Immunodeficiency Virus.

How much can you predict about what people will do by measuring the testosterone in their saliva?

A new genetic analysis of 239 patients provides the new information about which mutations put people at risk of developing atrial fibrillation (AF)

What's the best way to educate teens about managing food allergies that could cause anaphylaxis? Researchers from Canada decided to ask some teens.

New research indicates that contact force sensing technology increases the effectiveness of catheter ablations among patients with paroxysmal atrial fibrillation (AF) - but not among patients with non-paroxysmal AF.

The rapid growth of severe allergies and anaphylaxis in populations around the world has triggered efforts to find faster, safer and more effective cures than conventional immunotherapy.

The entrepreneur who founded Napster and secured Facebook some of its first venture capital money has donated $24 million to fund an allergy research center at Stanford University.

A experimental device designed to replace medications such a warfarin in the treatment of nonvalvular atrial fibrillation may have taken another step closer to market earlier this month.

A new analysis of Medicare data has found that prostate cancer patients who use testosterone replacement therapy live just as long as those who don't and do not have greater need for androgen deprivation therapy.