[Quantitative description of a calcium induced potassium conductance of the rabbit atrial myocardium by variation of the Ca++ concentration].
Action potentials of trabeculae from the left rabbit atrium were studied using a modified sucrose gap method. A mathematical treatment of the action potential time course and the phase plane trajectories gives an approximation of a potassium conductance of gK.GK increases be action potential shows a maximum at 1 s.gK reaches a steady state level after 40 s. The experimental findings are interpreted by means a mathematical model of a Ca++-induced K+-conductance.
D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D016275:Atrial Function; D002118:Calcium / Q000494:pharmacology*; D006325:Heart Atria / Q000187:drug effects; D007700:Kinetics; D008433:Mathematics; D009200:Myocardial Contraction / Q000187:drug effects*; D011188:Potassium / Q000378:metabolism*; D011817:Rabbits
D011188:Potassium; D002118:Calcium
Beeinflussung einer Kaliumleitfähigkeit des Vorhofmyokards durch Variation einer Ca++-Konzentration.