| | Surgeries Operations | Open Heart Surgery Pertaining to an upper heart chamber? The term you are looking for is "atrial". It refers to anything related to the atria, which are the two upper chambers of the heart. Open Heart Surgery - Related Articles How do create an eating disorder? Is Niobium Toxic? Fast Cure for Gout When screws become loose after back surgery? Does cornmeal has an effect in diabetics? Sources of Essential Oil Acupuncture is an example of Chinese what?