Dr. John G Yuan M.D.

Blood from body organs is transported to the heart via blood vessels, or veins.  Organs use oxygen to function, and they discharge blood that has been used that contains waste products like carbon dioxide. The veins then take the blood to the heart and back to the lungs, where the carbon dioxide is...

A vein is a blood vessel that carries blood through your body. Varicose veins are one among a spectrum of chronic vein problems. It is common and can be found in up to 20% of the adult population. The severity of the condition varies and while varicose veins are responsible for significant...

Decubitus ulcers or pressure ulcers, more commonly known as bedsores, are open wounds on your skin due to the prolonged pressure applied to the area. These ulcers occur mostly over the bony prominences such as the hips, tailbone, ankle, and heels. Bedsores are a frequent condition experienced by...

The formation of blood clots in one of the deep veins in the leg may not be entirely serious alone. However, if the clot breaks off and moves towards the heart and other organs, it may lead to complications. Blood clots in the leg may cause leg pain but may also not cause any symptoms at all....

An aneurysm is the formation of a bulge when the walls of the arteries weaken. It is an artificial condition that can remain undetected for years. If it ruptures, it could lead to many complications and, at times, even death. The following are a few figures concerning the deaths caused by different...

What is atherosclerosis?Atherosclerosis is also known as arteriosclerotic vascular disease or ASVD. It is a particular type of arteriosclerosis in which an artery wall gets thickened as an effect of attack and accumulation of white blood cells and rupture of the intimal smooth muscle cell producing...