Waking up suddenly gasping for air at night may signal a hidden heart condition. A cardiologist explains causes, symptoms, ...

Four-year-old Ellie Rudd – who loved mud and getting dressed up and having dance parties with her brother and sisters – died ...

Pulse oximeters use light to measure how much oxygen is in a person’s blood. For most people, a normal pulse oximeter reading is between 95% and 100%, researchers said in background notes. Readings ...