Mark William Sheldon M.D.

What is lupus?Lupus or systemic lupus erythematosus is an autoimmune disorder that may affect skin, kidneys, brain, and other organs. According to Lupus Foundation of America, about 1.5 million people in U.S. have lupus. This condition is seen more in women than in men....

A recent CDC report shows that many of restaurants and grocery stores have food that contain extremely high levels of sodium in its product. Breads and rolls were noted to be the most important culprits among these. Some of the foods that contribute to almost 44% of the sodium content that we...

Heart failure refers to the condition where the organ fails to pump enough blood to different parts of the body to meet the demand. The disease refers to the weak pumping power of heart. In this condition, the rate of flow of blood through the heart is slow and the pressure increases. In most cases,...

What is a bubble study?A bubble study is a type of echocardiogram, which is the ultrasound of the heart. An echocardiogram is done to visualize the heart and its surrounding areas. Better images of the heart can be produced when a “contrast” is used during the echocardiogram. In a bubble study,...

What is cholesterol?Cholesterol is primarily produced in the liver, which makes approximately 1,000 milligrams of cholesterol per day. However, it can also be produced by the cells lining the small intestines and also by each cell present in the body. Abnormally low cholesterol levels would mean...

A stent is an expandable metal tube that is used to treat weak arteries. These stents help in opening up arteries that are narrowed down by the accumulation of plaques. Implantation of the tube helps in reducing the constriction of blood flow in the affected region. The metal mesh is implanted...