alpha 1-Adrenoceptor stimulation partially inhibits ATP-sensitive K+ current in guinea pig ventricular cells: attenuation of the action potential shortening induced by hypoxia and K+ channel openers.


Effects of alpha 1-adrenoceptor stimulation on the action potential shortening produced by K+ channel openers (KCOs) or hypoxia and on the ATP-sensitive K+ current (IK.ATP) activated by KCOs were examined in guinea-pig ventricular cells by using conventional microelectrode and patch-clamp techniques. In papillary muscles, nicorandil (1 mM) or cromakalim (30… (More)


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