X-rays are used in a variety of places, from doctors' offices to airport checkpoints. Although the medical scans help doctors and patients around the world, they're not without risks. Here are five things to know about X-ray radiation. See more »

Hallucinogens have a reputation for expanding your mind. Is it warranted? Science says that a little psilocybin (or mescaline or MDMA) might be able to cure what ails you -- even addiction to drugs like heroin and meth. See more »

The EUPHORIA trial was an experimental study to find out if ultrafiltration would work well in heart failure patients with fluid overload and diuretic resistance. See more »

Treatment for fluid overload -- formerly known as "dropsy" -- has evolved quite a bit since ancient times. See more »

A recently FDA-approved rapid HIV test (one that doesn't have to be sent to a laboratory for processing) can use blood, serum or oral fluids with equal accuracy. See more »

Researchers designed a clinical study to compare the safety and efficacy of ultrafiltration with that of diuretic drugs. The study was nicknamed the RAPID-CHF study. What were the results. See more »

An MRI machine is more than just a big, claustrophobia-inducing tube. How much do you know about what's going on inside -- or what's going on inside your body while you're in there? See more »

Ultrafiltration is a medical therapy that removes excess salt and water from the bodies of patients who have a condition called fluid overload. See more »

Diuretics stop working for many people with advanced heart failure, so scientists developed a procedure known as ultrafiltration. The UNLOAD study compared the safety and efficacy of ultrafiltration with that of diuretic drugs. What did they find? See more »

The American Heart Association estimates that about 5 million people nationwide have heart failure and the cost of treatment in 2008 rose to $35 billion. Why does a disease with no cure cost so much money? See more »