Nutrition basics
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COVID-19 diagnostic testing
Find out how to test to learn if you're infected with the virus that causes COVID-19.
Cardiac resynchronization therapy
This heart failure treatment uses a pacemaker or a pacemaker with a defibrillator. Know when the treatment is needed.
Carotid endarterectomy
This procedure removes plaque buildup in the carotid artery to help reduce your risk of stroke.
Carotid ultrasound
This test examines the blood flow through the arteries in the neck that deliver blood from the heart to the brain.
Cataract surgery
Cataract surgery — Overview covers risks, complications, results of this eye surgery.
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.
Circumcision (male)
Learn about the benefits and risks of surgery to remove the skin that covers the tip of the penis.
Cochlear implants
This electronic device improves hearing in people who have severe hearing loss from inner ear damage.
Coronary angioplasty and stents
Coronary angioplasty and stents can open clogged blood vessels that deliver blood to heart muscles.
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.
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