Final answer:
The hole in the septum primum created via apoptosis in the fetal heart is the foramen ovale. It closes after birth when the septum primum flap covers it, and the typical adult circulatory pattern is established.
Step-by-step explanation:
The name of the hole in the septum primum made through apoptosis is the foramen ovale. During fetal development, the foramen ovale allows blood to pass directly from the right atrium to the left atrium, bypassing the pulmonary circuit. After birth, within a few seconds, the septum primum, a flap of tissue, covers the foramen ovale. This closure converts the fetal circulation to the typical adult circulation as the sinoatrial (SA) node takes over the role of initiating the heartbeat, further establishing the heart's function.