Sematilide hydrochloride (CK-1752 hydrochloride) 作为选择性IKr通道阻滞剂，能以浓度依赖方式抑制延迟整流钾电流，其半数抑制浓度为25 μM，属于III类抗心律失常药物。

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2~8℃避光保存，有效期3年。

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[2] Bigger, J. T. and Hoffman, B. F.: Anti-arrhythmic drugs. In A. F. Gilman, L. S. Goodman, and A. Gilman (eds.): The Pharmacological Basis of Therapeutics. New York: MacMillan Publishing Co., Inc., 1985, Ed. 7, pp. 761–792.