Nutrition basics
Learning Center
Viral hemorrhagic fevers
Learn more about the symptoms, treatment and prevention of these sometimes deadly diseases.
Viral gastroenteritis (stomach flu)
This condition, often called stomach flu, is usually harmless, except for infants and people with immunosuppression. Symptoms can usually be managed.
Vertebral tumor
Learn about these tumors that grow in the bones of the spine, causing pain and weakening the spinal column. Find out about diagnosis and treatment.
Ventricular tachycardia
This rapid heart rate can be a medical emergency. Know the warning symptoms and how it's treated.
Ventricular fibrillation
Without fast treatment, this heart rhythm problem can cause death within minutes. Learn the symptoms of VFib and what actions to take to save a life.
Vasovagal syncope
Learn about what causes a brief loss of consciousness and when to see a doctor if this happens to you.
Vasculitis
An inflammation of the blood vessels, vasculitis may thicken and weaken blood vessel walls. If blood flow is restricted, organ damage can occur.
Vascular rings
Learn more about this condition in which malformations of the aortic arch encircle the windpipe and esophagus and can press against them.
Varicose veins
This common condition causes lines or cords to develop under the skin. Learn self-care steps to take and what treatments there are.
Varicocele
Find out how this condition involving the enlargement of veins in the scrotum can affect sperm quality and production.
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