“CHDs change the normal flow of blood through the heart,” experts say. Scientists say the heart has two sides, separated by an inner wall called the septum. They explain as follows: “With each heartbeat, the right side of the heart receives oxygen-poor blood from the body and pumps it to the lungs. The left side of the heart receives oxygen-rich blood from the lungs and pumps it to the body. The septum prevents mixing of blood between the two sides of the heart. However, some babies are
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