A 7-month-old infant presents with episodes of cyanosis worsening during feeding and crying. Parents note the infant instinctively assumes a squatting position during play. Vital signs show HR 145 bpm, RR 32, SpO2 78% on room air, and BP 85/52. Physical examination reveals a harsh systolic ejection murmur at the left upper sternal border. Chest X-ray demonstrates a "boot-shaped" heart. No hepatomegaly is noted. Which cardiac abnormality is most likely present?
- A)Transposed great vessels, PDA, and coarctation
- B)Ventricular septal defect, overriding aorta, right ventricular outflow obstruction, and right ventricular hypertrophyGABARITO
- C)Endocardial cushion defect with mitral atresia
- D)Aortic stenosis, atrial septal defect, left ventricular hypertrophy, and PDA
- E)Atrial septal defect, tricuspid stenosis, pulmonary edema, and left ventricular hypertrophy
Explicação
Tetralogy of Fallot consists of right ventricular outflow obstruction, right ventricular hypertrophy, overriding aorta, and ventricular septal defect. Cyanotic spells worsen with decreased systemic vascular resistance and improve with squatting, which increase... Ver explicação completa e trilha adaptativa →