title: [Phasic and tonic components of mechanical tension in the myocardium of the atria and ventricle of the frog].
abstract: The complex mechanical response of the frog atria to sustained depolarizing current were divided into three components: T1--owing to slow inward calcium current; TII--related to calcium release from intracellular sources; and TIII--related to potential--dependent sodium-calcium exchange diffusion. Differences in electromechanical coupling of the frog atrium and ventricle myocardium, are discussed.
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena; D002118:Calcium / Q000378:metabolism*; D004594:Electrophysiology; D006325:Heart Atria; D006352:Heart Ventricles; D066298:In Vitro Techniques; D009200:Myocardial Contraction; D009206:Myocardium / Q000378:metabolism; D011895:Rana ridibunda
chemical_list: D002118:Calcium
vernacular_title: Issledovanie fazicheskogo i tonicheskogo komponentov mekhanicheskogo napriazheniia v miokarde predserdiĭ i zheludochka liagushki.