SA node cell to atrial cardiac muscle cell communication by electrical coupling GO:0086021 SA node cardiomyocyte to atrial cardiomyocyte communication by electrical coupling biological_process tb sinus node cardiomyocyte to atrial cardiomyocyte communication by electrical coupling sinoatrial node cardiomyocyte to atrial cardiomyocyte communication by electrical coupling SA node cardiac muscle cell to atrial cardiac muscle cell communication by electrical coupling SAN cardiomyocyte to atrial cardiomyocyte communication by electrical coupling 2011-11-10T09:20:39Z The process that mediates signaling interactions between an SA node cardiomyocyte and an atrial cardiomyocyte by transfer of current between their adjacent cytoplasms via intercellular protein channels. cell communication by electrical coupling involved in cardiac conduction SA node cell to atrial cardiac muscle cell communication