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Figure 2 (A) Relationship of residual shunt (by echo-Doppler within 24 hours of device implantation) with shape of the ductus; note that there is no significant (p > 0.1) relationship. (B) Relationship of residual shunt (within 24 hours of procedure by echo-Doppler) to the size of ductus is shown; note higher incidence of residual shunts with larger ducts.
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