300 Longwood Avenue Boston, MA 02115 (617) 355-6000 Clinical Services (Cardiovascular Program): Fetal Intervention Back to New Research & Treatments Children's Hospital Boston is at the forefront of ultrasound-guided fetal surgery/interventions and has performed these in utero procedures with increasing success. The following are Children's Cardiovascular Fetal Program's current research: Balloon Dilation of Severe Aortic Stenosis in the Fetus: Potential for Prevention of Hypoplastic Left Heart Syndrome Creation of an Atrial Septal Defect In Utero for Fetuses With Hypoplastic Left Heart Syndrome and Intact or Highly Restrictive Atrial Septum Hypoplastic Left Heart Syndrome With Intact or Highly Restrictive Atrial Septum: Outcome After Neonatal Transcatheter Atrial Septostomy Improved Surgical Outcome After Fetal Diagnosis of Hypoplastic Left Heart Syndrome The information on this website should not be taken as medical advice, which can only be given to you by your personal health care professional. Copyright © Children's Hospital Boston. All rights reserved.