Broken Heart is a pickup in Epiphany, a mod for The Binding of Isaac.
+1 Broken Heart.
Only obtainable via True Love and Queen of Hearts?.
If playing as Tarnished Judas, it can also be obtained via his Birthright, or by defeating Krampus (2 are dropped).
Picking up a Broken Heart removes 1 Blue Broken Heart from the health bar.