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How does warfarin affect the activated coagulation time?

Abstract：

BACKGROUND:The activated coagulation time (ACT) is a rapid measurement of a patient's level of heparin anticoagulation during cardiac catheterization. Patients receiving warfarin therapy occasionally are seen at the catheterization laboratory for emergent procedures. The effects of warfarin on ACT activity have not been previously described. We compared the ACT and the international normalized ratios (INR) in 77 patients receiving warfarin and 57 patients who were not receiving any anticoagulation (controls). RESULTS:Both the mean ACT (131+/-17.0 seconds) and INR (2.5+/-0.90 seconds) of the anticoagulated patients differed from the controls (ACT=115+/-14.5 seconds, INR=1.0+/-0.10 seconds; P< 0.05). The ACT increased linearly with INR in the warfarin group (r=0.70, P< .001). There was no relation between ACT and INR in the control group. CONCLUSION:Patients receiving warfarin therapy will have a linear increase in ACT develop similar to patients receiving heparin therapy.

journal_name

Am Heart J

journal_title

American heart journal

authors

Chang RJ,Doherty TM,Goldberg SL

doi

10.1016/s0002-8703(98)70223-6

subject

Has Abstract

pub_date

1998-09-01 00:00:00

pages

477-9

issue

3

eissn

0002-8703

issn

1097-6744

pii

S0002870398001288

journal_volume

136

pub_type

杂志文章

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