Patent Ductus Arteriosus Management in Children
Diagnosis and Assessment
- The American Heart Association recommends confirming a hemodynamically significant PDA through echocardiography with color Doppler in the parasternal short-axis view, and measurement of the transpulmonary gradient across the ductus with continuous-wave Doppler can estimate pulmonary artery pressure, with cardiac catheterization and angiography indicated in cases with significant elevation of pulmonary vascular resistance 1
- Diagnosis of PDA should be confirmed before initiating treatment, using echocardiography with color Doppler 2
Pharmacological Management
- The American Academy of Pediatrics recommends an initial dose of 10 mg/kg intravenously of ibuprofen, followed by two doses of 5 mg/kg given at 24-hour intervals, with monitoring of renal function before and during treatment, and assessment for signs of bleeding or bruising during treatment 3
- Indomethacin is an alternative NSAID for PDA closure, but has a higher risk of renal and gastrointestinal side effects 3
Monitoring Response to Treatment
- Serial echocardiograms are recommended to monitor response to therapy, with consideration of a second course of medical therapy if the first course fails 3, 2
Surgical Management
- Surgical closure is indicated when pharmacological treatment fails to close a symptomatic PDA, with consultation with ACHD interventional cardiologists recommended before surgical closure is selected 2
- The American College of Cardiology recommends consultation with ACHD interventional cardiologists before surgical closure, especially in cases with a calcified PDA 1
Catheter-Based Interventions
- Device closure is usually feasible and preferred over surgical approaches for older children with suitable anatomy, with standard practice including administration of at least 50-100 U/kg UFH at the time of implantation 1, 4
Special Considerations
- The American Academy of Pediatrics recommends cautious use of ibuprofen in infants with renal dysfunction, and avoidance of ibuprofen in infants with active bleeding, especially intracranial or gastrointestinal 3
- Very low birth weight infants with persistent PDA require careful monitoring due to significant morbidity associated with the condition 2
Patent Ductus Arteriosus Management
Indications for Closure
- The American Heart Association recommends closure for patients with left atrial and/or left ventricular enlargement, pulmonary arterial hypertension with net left-to-right shunting, and prior history of endarteritis 5, 6
- The American College of Cardiology suggests that it is reasonable to close even small asymptomatic PDAs by catheter device 6
Contraindications
- PDA closure is contraindicated in patients with PAH and net right-to-left shunt (Eisenmenger physiology) 6
Treatment Approach
- Device closure via transcatheter approach is the method of choice for older children and adults, particularly important in adults where ductal calcification and tissue friability make surgical manipulation hazardous 5, 7
- Surgical closure is indicated only when PDA is too large for device closure, distorted ductal anatomy precludes device closure, or concomitant cardiac surgery is required for other indications 5, 6
Surgical Considerations
- When surgery is necessary, it should be performed by a surgeon experienced in congenital heart disease surgery 5, 6
- Surgical success rate exceeds 95% with low early mortality, and recanalization is rare 5, 6
Follow-Up Management
- For small PDAs without left-heart volume overload, routine follow-up every 3 to 5 years is recommended 5, 6, 8
- After successful closure, patients can be discharged from follow-up once complete closure is documented by transthoracic echocardiography 5, 6
Diagnostic Confirmation
- Before initiating treatment, confirm diagnosis with echocardiography with color Doppler in parasternal short-axis view and measurement of transpulmonary gradient with continuous-wave Doppler to estimate pulmonary artery pressure 5, 7
- Cardiac catheterization is indicated when significant elevation of pulmonary vascular resistance is suspected, echocardiography is non-diagnostic, or assessment of shunt direction, PVR, and vascular bed reactivity is needed 5, 7
Patent Ductus Arteriosus Closure in Term Infants
Treatment Approach
- The American Heart Association suggests that device closure via transcatheter approach is the method of choice for term infants and older children with suitable anatomy, with success rates exceeding 95% and complete closure approaching 100% in late-term follow-up 9, 10
- The use of the AMPLATZER Duct Occluder can close PDAs as large as 16 mm with no long-term residual shunting, and is FDA-approved for this purpose 9