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The most common cause of high blood cholesterol is an unhealthy lifestyle. However, the genes that you inherit from your parents, other medical conditions, and some medicines may also cause high blood cholesterol.

Peripheral artery disease is more common in blacks than any other racial or ethnic group. The major risk factors for peripheral artery disease include smoking, older age, and diseases and conditions such as diabetes, high blood pressure, high blood cholesterol, coronary heart disease, stroke, and metabolic syndrome.

Common sleep apnea signs and symptoms are snoring or gasping during sleep; reduced or absent breathing, called apnea events; and sleepiness. Undiagnosed or untreated sleep apnea prevents restful sleep and can cause complications that may affect many parts of your body.

You may have a higher risk of insomnia because of your age, family history and genetics, environment or occupation (work), lifestyle, stress or worrying about sleep, or your sex.

The major types of stroke are ischemic (when an artery to the brain becomes blocked) and hemorrhagic (when an artery in the brain leaks blood or breaks open).

For most people with high blood pressure, a doctor will develop a treatment plan that may include heart-healthy lifestyle changes alone or with medicines. Heart-healthy lifestyle changes, such as heart-healthy eating, can be highly effective in treating high blood pressure.

Sickle cell disease is an inherited disease caused by defects, called mutations, in the beta globin gene that helps make hemoglobin.

Your doctor may diagnose angina based on your medical history, a physical exam, and diagnostic tests and procedures. These tests can help assess whether you need immediate treatment for a heart attack. Some of these tests may help rule out other conditions.

Cardiac catheterization takes place in a catheterization laboratory, or cath lab, which is similar to a small operating room. A long thin tube called a catheter is inserted via a needle, guidewire, and sheath into a blood vessel leading to the heart.

Cystic fibrosis is an inherited disease caused by mutations in a gene called the cystic fibrosis transmembrane conductance regulator (CFTR) gene.