title: [Contraction-relaxation cycle in the heart].
mesh_terms: D000200:Action Potentials; D000818:Animals; D001692:Biological Transport; D001696:Biomechanical Phenomena; D002118:Calcium / Q000378:metabolism; D004594:Electrophysiology; D006321:Heart / Q000502:physiology; D066298:In Vitro Techniques; D007473:Ion Channels / Q000378:metabolism; D008929:Mitochondria, Heart / Q000502:physiology; D009200:Myocardial Contraction / Q000187:drug effects; D009206:Myocardium / Q000378:metabolism; D012964:Sodium / Q000378:metabolism
chemical_list: D007473:Ion Channels; D012964:Sodium; D002118:Calcium
vernacular_title: Tsikl sokrashchenie-rasslablenie v serdtse.