Dr. Glenn Barnhart talks about what the normal heart looks like. The heart is a four-chamber structure. The valves of the heart serve two very important purposes. They open so blood can get from one chamber to the next and they close so blood doesn't back up from the former chamber. Valves can be too tight or not tight enough. When they are too tight, it is called stenosis and when they are not tight enough it is called regurgitation. For more information about heart surgery at Swedish, please visit [ Ссылка ]
