ductal-dependent
Describing congenital heart lesions where maintaining patent ductus arteriosus is essential for adequate circulation.
Full Definition
Ductal-dependent describes congenital heart lesions in which the patent ductus arteriosus provides critical blood flow for either pulmonary or systemic circulation, making its closure potentially life-threatening. In ductal-dependent pulmonary circulation (such as pulmonary atresia), the ductus provides the primary source of blood flow to the lungs. In ductal-dependent systemic circulation (such as hypoplastic left heart syndrome), the ductus supplies blood to the body. Recognition of ductal-dependent physiology is crucial for neonatal management, as these patients require prostaglandin E1 infusion to maintain ductal patency until surgical intervention can be performed. Ductal closure in these patients can lead to rapid clinical deterioration and cardiovascular collapse.
Usage
Usage note: Hyphenate when used as an adjective; critical concept for neonatal cardiac emergencies.
In Context
- "The newborn with ductal-dependent pulmonary circulation was started on prostaglandin E1 infusion immediately." — NICU admission note
- "Echocardiography confirmed ductal-dependent systemic circulation in this patient with interrupted aortic arch." — Cardiology consultation