Erb's point (cardiology)
Encyclopedia
Intercostal space
The intercostal space is the space between two ribs . Since there are 12 ribs on each side, there are 11 intercostal spaces, each numbered for the rib superior to it.-Structures in intercostal space:* several kinds of intercostal muscle...
on the left sternal border where S2 is best auscultated. It is essentially the same location as what is referred to with left lower sternal border (LLSB).
Some sources include the fourth left interspace.