4 Your Health October 4, 2023 5:25 pm CDC creates new tool to track heart conditions The CDC has created a new diagnostic code to track coronary microvascular dysfunction. New 4’s Eun Yang spoke to a patient and doctor about the impact of these new developments. Local 2:27 Vitamin K shots for newborns: A doctor debunks myths and explains why the shots are essential 2:09 DC clinic offers mental health support for children 2:24 ‘We need to save our kids': Mother who lost son to fentanyl fights for change 2:31 Spine surgery technology used in DC reduces operating time 2:21 Family honors boy with foundation to find cure for rare form of cancer