Where should you check an infant's pulse before starting CPR?

The brachial artery is the appropriate location to check an infant's pulse before starting CPR because it is the most accessible pulse point for infants. This artery runs along the inside of the upper arm and is easier to palpate in infants due to their smaller size and the relative depth of other pulse locations.

In infants, the carotid artery is less ideal, as anatomical differences make it challenging to feel and locate. The radial artery, commonly used for adults, is also too small in infants to reliably check for a pulse. The femoral artery can be used for assessing a pulse, but it is not the first choice for infants due to its location and ease of access. Thus, checking the brachial artery provides a safer and more effective method for verifying circulation in infants during emergency situations.