A cyanotic newborn presents with persistent SpO2 of 78% and HR 160 bpm. Echocardiography reveals tricuspid atresia with a hypoplastic right ventricle and an atrial septal defect allowing right-to-left shunting. Chest X-ray shows decreased pulmonary vascular markings. The infant has not received prostaglandin E1 therapy. Physical examination reveals no hepatomegaly. Which of the following additional findings is most likely present?
- A)Compensatory patent ductus arteriosus or ventricular septal defect to permit pulmonary blood flowGABARITO
- B)Left ventricular hypertrophy due to systemic outflow obstruction
- C)Vegetations on the pulmonic valve
- D)Complete transposition without any septal communication
- E)Severe aortic coarctation with upper extremity cyanosis only
Explicação
Tricuspid atresia prevents normal flow from the right atrium to the right ventricle, so survival depends on shunting and alternative pathways for pulmonary blood flow, such as a VSD or PDA. The right ventricle is hypoplastic, and cyanosis appears early. An ASD... Ver explicação completa e trilha adaptativa →