Anaesthetic phencyclidine, blocker of the ATP‐sensitive potassium channels

Abstract
The double sucrose gap and patch‐clamp studies revealed that phencyclidine blocked the ATP‐sensitive K+ channel in isolated cardiac cells (half‐maximal inhibition at ≈20 μM; Hill coefficient ≈1). 10μM phencyclidine increased the inward Ca2+ current and blocked the outward K+ current in the frog auricle trabeculae. The phencyclidine effects on the frog auricle trabeculae and the isolated cardiac cells proved to be quite reversible.