生物活性 | |||
---|---|---|---|
描述 | Azimilide dihydrochloride is an antiarrhythmic drug with Vaughn Williams class III properties, which blocks both fast (IKr) and slow (IKs) components of the delayed rectifier cardiac potassium channel. Azimilide does not exhibit reverse-use dependence, that is, its binding characteristics and effectiveness are not related to the heart rate[3]. Azimilide prolongs cardiac refractory period in a dose-dependent manner, as manifested by increases in action potential duration, QTc interval, and effective refractory period. Azimilide does not affect PR or QRS interval and minimally affects hemodynamic properties such as blood pressure and heart rate. Azimilide has shown excellent efficacy (>85%) in suppressing supraventricular arrhythmias in a variety of dog models. It also suppressed complex ventricular arrhythmias in infarcted dogs and, in a sudden death cardiac model, decreased mortality[4]. In patients with a history of atrial fibrillation/flutter, oral azimilide controlled arrhythmias more effectively than placebo in a 6-month randomised double-blind study. At a dosage of 125 mg once daily, azimilide significantly increased the time to first symptomatic recurrence of atrial fibrillation/flutter[5]. |
实验方案 | |||
---|---|---|---|
1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
1.88mL 0.38mL 0.19mL |
9.42mL 1.88mL 0.94mL |
18.84mL 3.77mL 1.88mL |
参考文献 |
---|
[3]Carlson M. Azimilide dihydrochloride. Expert Rev Cardiovasc Ther. 2005;3(3):387-391 [5]Clemett D, Markham A. Azimilide. Drugs. 2000;59(2):271-279 |