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Difficulty: HardPediatric Cardiovascular Disorders

Match each patient's clinical presentation (indicating a specific genetic syndrome or teratogenic exposure) with the congenital heart defect most classically associated with their condition.

  • A 15-year-old girl with primary amenorrhea, short stature, a webbed neck, and a broad chest with widely spaced nipples.Bicuspid aortic valve and coarctation of the aorta
  • A newborn with upslanting palpebral fissures, epicanthal folds, a single palmar crease, and prominent hypotonia.Complete atrioventricular septal defect
  • A 4-year-old boy with 'elfin' facies, intellectual disability, hypercalcemia, and an unusually friendly, highly verbal demeanor.Supravalvular aortic stenosis
  • A neonate born to a mother with bipolar disorder who was maintained on her primary mood stabilizer throughout the first trimester of pregnancy.Ebstein anomaly of the tricuspid valve
  • A neonate who develops tetany from profound hypocalcemia within the first 24 hours of life, with an absent thymic shadow on a chest radiograph.Truncus arteriosus

Answer

Turner syndrome matches with bicuspid aortic valve and coarctation of the aorta; Down syndrome matches with complete atrioventricular septal defect; Williams syndrome matches with supravalvular aortic stenosis; maternal lithium exposure matches with Ebstein anomaly; and DiGeorge syndrome matches with truncus arteriosus.
Each patient presentation describes a classic genetic syndrome or teratogenic exposure that has a strong, highly tested association with a specific congenital heart defect. Recognizing the underlying condition is the primary step, followed by recalling the cardiac anomaly most frequently linked to that condition. Turner syndrome (45,X) is associated with left-sided obstructive lesions. Down syndrome (Trisomy 21) is strongly linked to endocardial cushion defects. Williams syndrome involves a deletion of the elastin gene, leading to supravalvular aortic stenosis. First-trimester lithium exposure causes Ebstein anomaly, a displacement of the tricuspid valve. Finally, DiGeorge syndrome (22q11.2 deletion) disrupts the development of the pharyngeal pouches, leading to conotruncal abnormalities like truncus arteriosus.

Step-by-Step Solution

1
Analyze each patient's clinical presentation to diagnose the underlying genetic syndrome or teratogenic exposure.
Identified Turner syndrome, Down syndrome, Williams syndrome, maternal lithium exposure, and DiGeorge syndrome.
Recognizing the systemic condition is the required first step before identifying the associated cardiac pathology.
2
Correlate each identified systemic condition with its classic congenital heart defect.
Mapped the conditions to their respective cardiac anomalies based on established pathophysiological and genetic associations.
Many congenital heart defects are highly syndromic, and matching them tests the ability to integrate cardiovascular pathology with medical genetics and teratology.

Key Concept

Associations between genetic syndromes/teratogens and specific congenital heart defects
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Topics

Pediatric Cardiovascular Disorders

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