What medication is typically prescribed for a pregnant client with mitral valve prolapse receiving anticoagulant therapy?

• A. Warfarin
• B. Heparin sodium
• C. Vitamin K
• D. Aspirin

Answer: (B)

For a pregnant client with mitral valve prolapse who is undergoing anticoagulant therapy, heparin sodium is the medication typically prescribed. Heparin is preferred during pregnancy because it does not cross the placenta, thereby minimizing the risks to the developing fetus, while still providing effective anticoagulation.

In the case of warfarin, although it is a common anticoagulant, it is contraindicated during pregnancy because it can cross the placenta and pose significant risks to the fetus, particularly during the first trimester when organogenesis occurs.

Vitamin K, while important in the management of anticoagulant therapy, is not an anticoagulant itself and does not provide the necessary prevention of thromboembolic events in this situation.

Aspirin can be used in certain scenarios for thrombo-prophylaxis, but it does not provide the same level of anticoagulation as heparin and is typically not the first choice for managing pregnant patients with mitral valve prolapse who require significant anticoagulation.

Thus, heparin sodium is the appropriate medication because it effectively manages the condition while minimizing risks to both the mother and the fetus.