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Aortic valve regurgitation is when a person's aortic valve leaks. The aortic valve is 1 of the heart's 4 valves. These valves help the blood flow through the heart and out to the body. Normally, the aortic valve stops blood from flowing back into the left ventricle. With aortic valve regurgitation, some blood leaks back through the valve as the heart relaxes.

Certain types of weight-loss surgery change the way your body deals with the nutrients in the foods you eat. This causes a rapid amount of weight loss, but also may lead to complications.

Iron deficiency and anemia are common after a gastric bypass or other weight-loss surgery, especially in women. In fact, iron deficiency can occur in more than half of women who are past menopause when they have this surgery.

Pemphigus is a rare group of autoimmune diseases. It causes blisters on the skin and mucous membranes throughout the body. Pemphigus vulgaris is the most common type of pemphigus.

Spinal cord compression can occur anywhere along your spine. Symptoms include numbness, pain, and weakness.

Ulcers are open skin sores. Venous ulcers are leg ulcers caused by problems with blood flow in your leg veins.

Wound healing sounds simple, but it's actually quite complicated and involves a long series of chemical signals. Certain factors can slow or prevent healing entirely.

Your skin is a natural barrier against infection, so any surgery that causes a break in the skin can lead to an infection. Doctors call these infections surgical site infections because they occur on the part of the body where the surgery took place.

Hyperbaric oxygen therapy, or HBOT, is a type of treatment used to speed up healing of carbon monoxide poisoning, gangrene, stubborn wounds, and infections in which tissues are starved for oxygen.