Sietske N. Heyn is a medical writer with a PhD in neuroscience. Dr. Heyn's education includes a BS with honors from the University of Oregon, and a doctoral degree in neuroscience from the University of California at Davis. After completing postdoctoral training at the University of California, San Francisco, and many years of working as a medical writer at the Stanford University Center for Down Syndrome Research, Dr. Heyn now runs her own medical writing business.
Dr. Perlstein received his Medical Degree from the University of Cincinnati and then completed his internship and residency in pediatrics at The New York Hospital, Cornell medical Center in New York City. After serving an additional year as Chief Pediatric Resident, he worked as a private practitioner and then was appointed Director of Ambulatory Pediatrics at St. Barnabas Hospital in the Bronx.
Up to 50% of people with Down syndrome are born with a heart defect. The atrioventricular septal defect is the most common heart defect found in newborns
with Down syndrome. Other heart defects include
ventricular septal defect,
atrial septal defect, tetralogy of Fallot, and patent ductus arteriosus. Some
newborns with these types of heart defects will require surgery shortly after