Transcatheter aortic valve replacement (TAVR) is a minimally invasive procedure used to treat severe aortic stenosis, a condition where the aortic valve becomes too narrow and restricts blood flow ...

Medically reviewed byDeMario Butts, M.D., M.S. Arthroscopic knee surgery has long been one of the most common orthopedic procedures in the United States. This minimally invasive procedure treats a ...

What are the signs that show I need cataract surgery? "There are several key signs that someone may need cataract surgery," ...

What Is Allowed in a Carry-on Bag? Air travelers are likely familiar with the frustration of discovering you've packed something that isn't allowed through airport security. Whether traveling for ...

When Americans talk about the "middle class," it can sound like there's a single income range that applies no matter where you live. In reality, where you live can dramatically change how far your ...

What’s a Transesophageal Echocardiogram? A transesophageal echocardiogram (TEE) is a type of ultrasound test. Your doctor puts a tube down your esophagus with an ultrasound device that takes a series ...

Original Medicare rarely needs prior authorization, but nearly 99% of Medicare Advantage plans require it for expensive or specialized care. Starting in 2026, new CMS mandates require Medicare plans ...

How is radiation used to diagnose patients? In 1895, German/Dutch physicist Wilhelm Röntgen discovered x-rays. In one of his experiments, he found that x-rays could pass through the body, producing an ...

This analysis of IS-K was published in 2018 and is not being updated. For a more recent analysis of Islamic State Khorasan from the Transnational Threats Project, please click here. Islamic State ...