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European Journal of Cardio-Thoracic Surgery, Vol 5, 628-634, Copyright © 1991 by European Association for Cardio-thoracic Surgery
RA Hopkins, C Bull, SG Haworth, MR de Leval and J Stark
In this clinical study, 20 high risk infants and neonates were monitored to
identify and characterize pulmonary hypertensive crises following surgery
for congenital cardiac defects. Monitoring included right ventricular or
pulmonary artery pressure catheters and transcutaneous oximetry. Eleven
patients also had continuous analog recording of hemodynamic data so that
antecedents of crises and the sequence of events following treatment could
be reconstructed. Eleven of the 20 patients had one or more crises. Six of
these ultimately died whereas 5 patients survived with aggressive
vasodilator therapy. Four patients without crises but with episodic
pulmonary hypertension benefitted from pulmonary vasodilator therapy to
ease weaning from ventilatory support. Typically, each crisis was
associated with a stress event. Crises were difficult to ablate if not
rapidly treated and multiple crises would often cluster following an
initial event. High dose narcotic (fentanyl) analgesia was found to be
important in the postoperative management. Tolazoline and oxygen were the
most consistently useful vasodilators, but isoproterenol and nitrates also
played a role. Five of the children who died were examined post mortem:
histologically, there was increased pulmonary arterial muscularization in
2, in none were there changes of fixed pulmonary vascular disease. The
postoperative management must be individualized on the basis of monitored
responses of pulmonary circulation.
ARTICLES
Pulmonary hypertensive crises following surgery for congenital heart defects in young children
Thoracic Unit, Hospital for Sick Children, London, England, UK.
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