part of part of cardiac muscle cell action potential membrane repolarization membrane repolarization during action potential membrane repolarization during cardiac muscle cell action potential biological_process 2011-11-10T08:23:25Z The process in which ions are transported across a membrane such that the cardiac muscle cell plasma membrane potential changes in the direction from the positive membrane potential at the peak of the action potential towards the negative resting potential. GO:0086013 cardiac muscle cell membrane repolarization