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• 产品描述： Dofetilide is a sulfonamide class III antiarrhythmic agent and potassium channel blocker. Dofetilide selectively blocks cardiac ion channels of the rapid component of the delayed rectifier potassium current Ikr. This antiarrhythmic agent prolongs cardiac action potential duration and effective refractory period due to delayed repolarization without affecting conduction velocity. This results in a normal sinus rhythm. Dofetilide is used in the treatment of atrial fibrillation and flutter.

• 靶点： Potassium Channel

• 体内研究： Dofetilide (100 mg/kg, i.v.) does not suppress automaticity arrhythmias induced by two-stage coronary ligation and epinephrine or the coronary ligation and reperfusion arrhythmias, but suppresses the reentry arrhythmia induced by PES in dogs with old myocardial infarction (MI). Dofetilide also shows antiarrhythmic effect in some dogs with digitalis arrhythmia. Dofetilide increases QT interval and shows negative chronotropic effect like that of other class III drugs, but is different in antiarrhythmic profiles from those of other class III agents such as D-sotalol, E-4031, and MS-551 in that it does not prevent the occurrence of ventricular fibrillation (VF) immediately after coronary reperfusion and has some antiarrhythmic effects on digitalis arrhythmia. Dofetilide causes increased resorptions and the same stage-dependent malformations in Sprague-Dawley rats.

• 参考文献：
  1. Webster WS, et al. Teratology, 1996, 53(3), 168-175. 2. Bauer A, et al. J Cardiovasc Pharmacol, 2002, 39(3), 460-467. 3. Kiehn J, et al. Circulation, 1996, 94(10), 2572-2579. 4. Kiehn J, et al. J Cardiovasc Pharmacol, 1994, 24(4), 566-572. 5. Chen J, et al. J Cardiovasc Pharmacol, 1996, 28(4), 576-584.

• 溶解性： Soluble  in  DMSO

• 保存条件： 2-8°C

• 配置溶液浓度参考：
  

  	1mg	5mg	10mg
  1 mM	2.265 ml	11.323 ml	22.647 ml
  5 mM	0.453 ml	2.265 ml	4.529 ml
  10 mM	0.226 ml	1.132 ml	2.265 ml
  50 mM	0.045 ml	0.226 ml	0.453 ml

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本计算器可帮助您计算出特定溶液中溶质的质量、溶液浓度和体积之间的关系，公式为：

质量 (mg) = 浓度 (mM) x 体积 (mL) x 分子量 (g/mol)

• pg ng μg mg g kg =
  fM pM nM μM mM M *
  nL μL mL L *