Position of the heart of a 7-year-old child, pediatrics. The heart is located in the rib cage. It is shifted slightly to the left relative to the central axis represented by the sternum. Its apex is oriented downwards to the left. In the 7-year-old child, the apex is located at the level of the 5th intercostal space. While this cardiac apex is located at the level of the fourth intercostal space in the infant. In the 7-year-old child, the heart is in the same axis as that of the adult.