A fetal supraventricular tachycardia which converted from blocked premature atrial contractions

We are reporting a case of fetal supraventricular tachycardia (SVT) which converted from blocked premature atrial contractions (PAC). It has been treated by verapamil in utero. We suggest that fetal PACs are usually benign phenomena which resolve spontaneously, but require some follow-up to exclude the development of SVT. SVT is rare but complicated by fetal congestive heart failure or even fetal death.