Which statement about HLHS management is true?

Which statement about HLHS management is true?

• A. HLHS Management May Include Sub-Ambient FiO2, Hypercarbic Gas Mixtures, Prostaglandins, And Staged Surgical Repair
• B. HLHS Requires Immediate Heart Transplant In All Cases
• C. Oxygen Therapy Alone Is Sufficient
• D. HLHS Resolves Without Intervention

Answer: (D)

Managing HLHS centers on preserving systemic blood flow while preparing for definitive palliation. Because the left-sided structures are underdeveloped, the circulation relies on the patent ductus arteriosus and careful balance between pulmonary and systemic flows. Prostaglandin E1 is given to keep the ductus open, ensuring enough forward flow to the body while the heart undergoes staged repair. Oxygen is not used as a stand-alone therapy; too much oxygen can push blood to the lungs and steal from systemic perfusion, so clinicians carefully tailor oxygen delivery to help balance the two circulations. In many cases, strategies to adjust PVR—such as maintaining sub-ambient oxygen levels or, when needed, applying mild hypercarbia—may be used to prevent pulmonary overcirculation, all under close monitoring. Definitive care involves a planned sequence of surgeries (Norwood-style initial palliation, followed by the Glenn and Fontan procedures) rather than assuming transplant is required in every case. HLHS does not resolve without intervention. Ongoing transplant is not universally required, and oxygen therapy alone cannot correct the fundamental problem, so those ideas aren’t consistent with how HLHS is managed.

Managing HLHS centers on preserving systemic blood flow while preparing for definitive palliation. Because the left-sided structures are underdeveloped, the circulation relies on the patent ductus arteriosus and careful balance between pulmonary and systemic flows. Prostaglandin E1 is given to keep the ductus open, ensuring enough forward flow to the body while the heart undergoes staged repair. Oxygen is not used as a stand-alone therapy; too much oxygen can push blood to the lungs and steal from systemic perfusion, so clinicians carefully tailor oxygen delivery to help balance the two circulations. In many cases, strategies to adjust PVR—such as maintaining sub-ambient oxygen levels or, when needed, applying mild hypercarbia—may be used to prevent pulmonary overcirculation, all under close monitoring. Definitive care involves a planned sequence of surgeries (Norwood-style initial palliation, followed by the Glenn and Fontan procedures) rather than assuming transplant is required in every case. HLHS does not resolve without intervention.

Ongoing transplant is not universally required, and oxygen therapy alone cannot correct the fundamental problem, so those ideas aren’t consistent with how HLHS is managed.