When someone has to have a heart valve replaced, there are a few things that are done to determine what type of valve the patient will recieve. The patient could recive one of the following valves: mechanical valves, tissue valves, homograft  valves, or allograft valves. These all have there advantages and disadvantages.

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Did you know...
Your body has about 5.6 liters (6 quarts) of blood. This 5.6 liters of blood circulates through the body three times every minute. In one day, the blood travels a total of 19,000 km (12,000 miles)--that's four times the distance across the US from coast to coast.
Allograft Valves Homograft Valves Tissue Valves Mechanical Valves
Types of Valves