Question

Who is small murmur here?

Answer 1

Answer:

This murmur is typically heard at 1 to 2 months of age. Babies with this type of murmur are typically born with relatively small blood vessels to the lungs. After the main trunk of the pulmonary artery leaves the heart, it branches to the right and the left lung. Because babies are relatively thin from front to back, these branches come off at a sharp angle from the main lung artery. As blood goes around these corners, some turbulence is created, resulting in this type of murmur. As the baby grows and becomes bigger from front to back, the main branch lung vessels do not take such a sharp turn to the lungs. Also, the lung themselves get larger. This type of murmur typically disappears when the baby reaches 6 to 9 months of age.