part of part of membrane repolarization membrane repolarization during cardiac muscle cell action potential bundle of His cell action potential membrane repolarization during bundle of His cell action potential biological_process membrane repolarization during bundle of His cardiac muscle cell action potential 2011-11-16T11:50:41Z GO:0086050 The process in which ions are transported across a membrane such that the bundle of His cardiac muscle cell membrane potential changes in the direction from the positive membrane potential at the peak of the action potential towards the negative resting potential.