The heart extends from which intercostal spaces and lines?

The heart extends from which intercostal spaces and lines?

• A. From the 1st to the 4th intercostal space; from the left border of the sternum to the right mid-clavicular line
• B. From the 3rd to the 6th intercostal space; from the sternum to the midline
• C. From the 2nd to the 5th intercostal space; from the right border of the sternum to the left mid-clavicular line
• D. From the 5th to the 9th intercostal space; from the sternum to the left nipple

Answer: (C)

Understanding where the heart sits in the chest involves knowing its vertical and horizontal boundaries. The heart’s upper edge sits around the level of the second intercostal space near the right side of the sternum, and its lower edge reaches the fifth intercostal space at the left midclavicular line, where the apex is felt. The right border lies adjacent to the right border of the sternum, while the left border extends toward the left midclavicular line. So describing the heart as extending from the 2nd to the 5th intercostal spaces and from the right border of the sternum to the left midclavicular line accurately captures its typical location within the chest.

Understanding where the heart sits in the chest involves knowing its vertical and horizontal boundaries. The heart’s upper edge sits around the level of the second intercostal space near the right side of the sternum, and its lower edge reaches the fifth intercostal space at the left midclavicular line, where the apex is felt. The right border lies adjacent to the right border of the sternum, while the left border extends toward the left midclavicular line. So describing the heart as extending from the 2nd to the 5th intercostal spaces and from the right border of the sternum to the left midclavicular line accurately captures its typical location within the chest.