Healthy retirement
Learning Center
Coronary artery bypass surgery
This major heart surgery, also called CABG, creates a new route for blood to flow around a blocked artery. Learn why it's done and know the steps to take during recovery.
Coronary angioplasty and stents
Coronary angioplasty and stents can open clogged blood vessels that deliver blood to heart muscles.
Coronary angiogram
Learn more about this heart disease test that uses X-ray imaging to see the heart's blood vessels.
Complete blood count (CBC)
Learn what to expect from having this common blood test, why it's done and how to prepare.
Cochlear implants
This electronic device improves hearing in people who have severe hearing loss from inner ear damage.
Circumcision (male)
Learn about the benefits and risks of surgery to remove the skin that covers the tip of the penis.
Cholesterol test
Measuring the amount of cholesterol and triglycerides in your blood can help predict your risk of blocked arteries in your heart and brain.
Chest X-rays
Learn what these chest images can show and what conditions they may uncover.
Cataract surgery
Cataract surgery — Overview covers risks, complications, results of this eye surgery.
Carotid ultrasound
This test examines the blood flow through the arteries in the neck that deliver blood from the heart to the brain.
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