In-depth

Complications

Mitral valve stenosis

In mitral valve stenosis, the mitral valve is narrowed, obstructing blood flow between the chambers on the left side of the heart.

Lifestyle and home remedies

How much sleep do you really need?

The usual advice is eight hours a night, but many factors, such as age and genetics, influence how much shut-eye you need.

Risk factors

Secondhand smoke

It might be someone else's smoke, but the risks are yours. Consider simple steps for avoiding secondhand smoke.

Symptoms

Fatigue

Fatigue can signal many things. Here are some tips to help you decipher why you're wiped out and to regain your energy.

Tests and diagnosis

Chest X-rays

Even with today's high-tech medical devices, the basic chest X-ray remains an important tool in diagnosing various conditions. Here's a look at how it works.

Apr. 01, 2014