A preterm baby with Patent ductus aeriosus all are true, EXCEPT:
Essentials of Diagnosis & Typical Features of PDA: Continuous machinery type murmur. Bounding peripheral pulses if large ductus present. Presentation and course depends on size of the ductus and the pulmonary vascular resistance. Clinical features of a large ductus are failure to thrive, tachypnea, and diaphoresis with feeds. Left-to-right shunt with normal pulmonary vascular resistance. PDA is the persistence of the normal fetal vessel joining the pulmonary aery to the aoa. It closes spontaneously in normal-term infants at 1-5 days of age. PDA accounts for 10% of all congenital hea disease. It is twice as common in females as in males. The clinical findings and course depend on the size of the shunt and the degree of pulmonary hypeension. Moderate to Large Patent Ductus Aeriosus: Pulses are bounding, and pulse pressure is widened due to diastolic runoff through the ductus. S1 is normal and S2 is usually narrowly split.The murmur is characteristic. It is a rough machinery murmur maximal at the second left intercostal space. Patent Ductus Aeriosus with Increased Pulmonary Vascular Resistance: Flow across the ductus is diminished. S2 is single and accentuated, and no significant hea murmur is present. The pulses are normal rather than bounding. Ref: Darst J.R., Collins K.K., Miyamoto S.D. (2012). Chapter 20. Cardiovascular Diseases. In W.W. Hay, Jr., M.J. Levin, R.R. Deterding, J.J. Ross, J.M. Sondheimer (Eds), CURRENT Diagnosis & Treatment: Pediatrics, 21e.
Narrow pulse pressure
Necrotizing enterocolitis
Continuous murmur
Congestive hea failure