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ＭＣＩ－１５４化学名为６－［４－（４－吡啶氨基）苯基］－４，５－二氢－３（２Ｈ）哒嗪酮，具有很强的强心、扩张血管和抗血小板聚集作用［１］，其强心作用的机制完全不同于强心甙类和儿茶酚胺类强心药，前者是通过抑制细胞内磷酸二酯酶，提高细胞内ＡＭＰ水平而发挥作?
MCI-154 has the chemical name of 6- [4- (4-pyridylamino) phenyl] -4,5-dihydro-3 (2H) pyridazinone, which has strong cardiac, dilated blood vessels and anti-platelet aggregation [1] The mechanism of its cardiac effect is totally different from that of cardiac glycosides and catecholamines. The former works by inhibiting intracellular phosphodiesterase and increasing intracellular AMP levels.