The word "sinoatrial" refers to the area in the heart that controls the heartbeat. It is responsible for sending electrical signals to make the heart beat. Full definition
Tohno Y, Tohno S, Viwatpinyo K, Minami T, Chaisuksunt V, Mahakkanukrauh P, Quiggins R. Age - related changes of elements in the human sinoatrial nodes. (oapublishinglondon.com)
Just a glimpse of the challenge comes from graduate student Sandra Grijalva's late breaking oral abstract describing «Induced Pacemaker Spheroids as a Model to Reverse - Engineer the Native Sinoatrial Node», which was presented yesterday. (emoryhealthsciblog.com)
Sinoatrial syncope: a condition where the electrical impulses of the heart are abnormal and the animal has episodes of syncope (fainting). (thedogplace.org)