Nonuniformity of contraction and relaxation of mammalian cardiac muscle.
Nonuniformity of contraction and relaxation in cardiac muscle results from relaxation asynchronies between segments in the central region and their interaction with the prevailing loading conditions, and this may reflect regional differences in activation or force potential at a given time during a twitch.
D000818:Animals; D002415:Cats; D006321:Heart / Q000502:physiology*; D007537:Isometric Contraction; D007700:Kinetics; D009200:Myocardial Contraction