A Patient Has Been Evaluated for a Coagulopathy, and Has

A patient has been evaluated for a coagulopathy, and has been given Coumadin as a mode of treatment.What screening test(s) should be performed to monitor this treatment, and what effect will this therapy have on the coagulation pathway?

A) APTT; initial decrease in the vitamin K-dependent factors of the intrinsic pathway
B) PT-INR; initial decrease in the vitamin K-dependent factors of the extrinsic pathway
C) PT-INR and APTT; initial decrease in the vitamin K-dependent factors of all pathways
D) PT-INR; initial decrease in all Vitamin K-dependent serine proteases

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