a) Heparin (unfractionated)

Probably

The ACC/AHA recommends that a continuous infusion of heparin be started at a rate of 80units/kg followed by a drip of 18units/kg/hr. The goal is to maintain an INR of 2-2.5. Unfractionated heparin should not be used with LMWH.

There may be more than one correct answer for this decision point.