A 3-day-old male infant presents with cyanosis and severe respiratory distress. Vital signs show HR 165 bpm, RR 58/min, BP 58/40 mmHg, SpO2 78% on room air, and temperature 36.8°C. Physical examination reveals a single S2 and systolic ejection murmur. Chest X-ray demonstrates an "egg-on-string" appearance with decreased pulmonary vascular markings. Arterial blood gas shows PaO2 42 mmHg. The infant has not received prostaglandin E1. Which of the following is the most likely diagnosis?
- A)Hypoplastic left heart syndrome
- B)Total anomalous pulmonary venous return
- C)Tetralogy of Fallot
- D)Transposition of the great arteriesGABARITO
- E)Truncus arteriosus
Explicação
Transposition of the great arteries (TGA) classically presents with cyanosis within the first days of life, egg-on-string chest X-ray appearance, single S2, and requires a patent foramen ovale or PDA for survival. Prostaglandin E1 is used to keep the ductus ar... Ver explicação completa e trilha adaptativa →