A new study has found that apolipoprotein B particle count and lipoprotein(a) count were critical indicators of risk for ...

Internal medicine and rheumatology specialist Siobhan Deshauer, MD, takes a look at visible signs of iron deficiency.

The semilunar valves stop the back flow of blood into the heart. There is a semilunar valve where the aorta leaves the left ventricle and another where the pulmonary artery leaves the right ventricle.