The Journal of Thoracic and Cardiovascular Surgery, Vol 75, 819-826, Copyright © 1978 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association
Response to experimental coarctation of the aorta and pulmonic stenosis in the fetal lamb
JD Burrington
The following conditions were surgically created in fetal lambs at the
gestational ages of 80 to 90 days: (1) preductal coarctation, (2)
postductal coarctation, (3) pulmonic stenosis, and (4) constriction of the
ductus arteriosus. Studies performed at the time of delivery showed the
following: Preductal coarctation and postductal coarctation often are
associated with a dilated ductus arteriosus that remains patent. Pulmonic
stenosis often results in prestenotic and poststenotic dilatation that may
include the ductus arteriosus. The fetal ventricles become hypertrophied in
response to the increased pressure work imposed by the distal stenoses.