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01.11.2012 | original article | Ausgabe 21-22/2012

Wiener klinische Wochenschrift 21-22/2012

Outcome of coumarin-therapy in an outpatient setting over a 10-year period

Coumarin-therapy in clinical practice

Zeitschrift:
Wiener klinische Wochenschrift > Ausgabe 21-22/2012
Autoren:
MD, DMedSc Eva Z. Reininghaus, MD Harald Schmidt, MD Ingrid Lafer, PhD Georg Gutjahr, Stefan M. Schmidt, MD Bernd Reininghaus, MD, PhD Prof. Hans-Peter Kapfhammer, MD Prof. Vinzenz Stepan

Summary

Objectives

A retrospective study was conducted on an unselected sample of patients on vitamin K antagonists (VKAs; phenprocoumon, acenocoumarol) in an outpatient setting in Austria. The main objective was to determine whether bleeding and thromboembolic events reported in randomised trials are comparable to the experience in clinical practice. In addition, we focused on differences between the two VKAs and the particular indications for treatment and influences of risk factors.

Participants

Total observation time was 10 years, the number of patients was 599 and the patient years-at-risk (pyr) was 1,856.

Results

Severe bleeding occurred in 1.1 % pyr and the bleeding-related mortality was 0.1 %. Severe thromboembolic events occurred in 2.8 % pyr, with a rate of fatal events of 0.3 %. A significant increase in risk was found in patients older than 75 years concerning bleeding as well as thromboembolic events. Acenocoumarol showed significantly higher rates in life-threatening and fatal bleeding episodes in comparison to phenprocoumon.

Conclusions

The outcome of patients receiving VKA in an office setting is similar to that reported in the literature and the use of VKAs in this setting appears to be safe.

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