Lack of fetal effect from adenosine administration in a pregnant patient.

Supraventricular Tachycardias are the most common cardiac rhythm disturbances in pregnant patients. Adenosine is the recommended medication to treat these arrhythmias in part because the medication is projected to be metabolized prior to crossing the placenta and producing any fetal effects. Reported here is a case of a pregnant patient treated with adenosine in which the fetal heart activity was monitored through point of care ultrasonography with documentation of no fetal impact from this medication. This is the first documentation of a lack of fetal effect from adenosine.