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Sickle Cell Disease

Sickle Cell Disease Sickle-Shaped Cells Clog the Bloodstream Sickle cell disease is an inherited blood disorder affecting mainly people of African descent. This blood disorder affects the hemoglobin in the red blood cell. Hemoglobin is the protein that carries oxygen throughout the bloodstream. People with sickle cell disease have inherited a gene from both their …

Pacemakers: How They Work (Heart)

Pacemakers: How They Work Device Normalizes Heartbeat The heart beats about 100,000 times each day. Each heartbeat begins with an electrical impulse from the heart’s natural pacemaker, the sinoatrial node (S-A node), found at the right atrium. The electrical impulse it produces travels across a pathway of heart muscle to the lower pumping chambers, causing …

Intermittent Claudication (Cramping During Exercise) (Artery Disease)

Intermittent Claudication Painful Cramping During Exercise Intermittent claudication is a painful, cramp-like condition usually experienced in the calves that begins during exercise and disappears at rest. Intermittent claudication is often a symptom of peripheral artery disease, a disease in which the arteries in the arms and legs become hardened in a manner similar to atherosclerotic …

Iron Deficiency (Anemia)

Iron Deficiency Anemia When the body lacks iron, hemoglobin isn’t produced and new red blood cells are not made. As the demand for oxygen intensifies, the body begins to produce new red blood cells, but these cells are anemic – smaller than normal (microcytic) and lacking hemoglobin – so they can’t transport oxygen. Low Iron …