RONALD I. CLYMAN Archives

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Mechanisms Regulating Closure of the Ductus Arteriosus

Introduction a a Portions of this chapter are reprinted from Chapter 54 in Avery’s Diseases of the Newborn, 10e. The ductus arteriosus represents a persistence of the terminal portion of the sixth branchial arch. During fetal life, the ductus arteriosus…

Patent Ductus Arteriosus in the Preterm Infant

Key Points Clinical signs of a symptomatic patent ductus arteriosus (PDA) usually appear later than echocardiographic signs and are related to the degree of left-to-right ductal shunting. Factors known to play a prominent role in regulation of ductal patency involve…