A 26-year-old primigravida woman comes to the labor and delivery ward at term with regular, painful contractions. Her prenatal course was unremarkable. She has a past medical history suggestive of mitral valve prolapse with regurgitation which is demonstrated on echocardiography. She takes no medications and has no allergies to medications. Examination shows that her cervix is 4 centimeters dilated and the fetus is in vertex presentation. The fetal heart rate is reassuring. Which of the following is the most appropriate management of this woman?