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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Walfridsson, Håkan Johansson, Birgitta Englund, Anders Kennebäck, Göran Schwieler, Jonas Kongstad, Ole Wåhlander, Karin Malm, Anders R. Edvardsson, Nils |
| Description | Country affiliation: Sweden Author Affiliation: Walfridsson H ( Department of Cardiology, University Hospital, Linköping, Sweden.) |
| Abstract | BACKGROUND: AZD0837 is an investigational oral anticoagulant that is bioconverted to its active form, AR-H067637, a selective direct thrombin inhibitor. OBJECTIVES: The objectives of the present study were to investigate if there are any clinically relevant adverse effects of intravenous AZD0837 on cardiac conduction, refractoriness and repolarization, and to study its safety and tolerability. METHODS: In this randomized, double-blind, parallel-group, placebo-controlled study (study code D1250C00026), invasive electrophysiological measurements were performed twice in 30 subjects with a history of, or ongoing, atrial flutter, starting 30 minutes after successful ablation of atrial flutter and then 60 minutes after start of an intravenous infusion of AZD0837. Pre-study warfarin therapy was not an exclusion criterion. The stimulation protocol was performed mainly at 500 and 400 ms drive cycle length. A 12-lead ECG was also recorded before and during AZD0837 infusion. Plasma concentrations of AZD0837 and its metabolites were obtained at predefined timepoints. RESULTS: Measurements were made at baseline and during stable plasma concentrations of the prodrug AZD0837 (mean +/- standard deviation 7.96 +/- 2.38 micromol/L, approximate target of 10 micromol/L), the intermediate metabolite AR-H69927 (1.26 +/- 0.39 micromol/L, target 1-2 micromol/L) and the active direct thrombin inhibitor AR-H067637 (0.35 +/- 0.14 micromol/L, target 0.5-1.0 micromol/L). There were no clinically relevant effects on cardiac conduction (QRS duration, PR interval, His bundle electrogram, Wenckebach point), refractoriness (atrial, atrioventricular and ventricular effective refractory periods) or repolarization (QT, QT interval corrected for heart rate using Fridericia's formula, QRS onset to the top of the T wave [QT(top)], QRS onset to the end of the T wave [QT(end)] or QT(top) - QT(end)). CONCLUSIONS: AZD0837 was well tolerated, and had no clinically relevant effects on cardiac electrophysiology of the target population, either in subjects previously treated with warfarin or in those without previous treatment. |
| File Format | HTM / HTML |
| ISSN | 11732563 |
| Issue Number | 7 |
| Volume Number | 30 |
| e-ISSN | 11791918 |
| Journal | Clinical Drug Investigation |
| Language | English |
| Publisher | Springer |
| Publisher Date | 2010-01-01 |
| Publisher Place | New Zealand (Aotearoa) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Pharmacology Anticoagulants Adverse Effects Drug-related Side Effects And Adverse Reactions Thrombin Antagonists & Inhibitors Adult Aged Pharmacokinetics Double-blind Method Electrocardiography Electrophysiologic Techniques, Cardiac Female Humans Male Middle Aged Prodrugs Journal Article Multicenter Study Randomized Controlled Trial Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Pharmacology (medical) |
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