Overview
Kousseff syndrome, also known as 22q11.2 deletion syndrome, is characterized by conotruncal cardiac malformations including interrupted aortic arch, tetralogy of Fallot, truncus arteriosus, and pulmonary atresia with ventricular septal defect, often associated with chromosomal microdeletions.Diagnosis
Key Diagnostic Criteria: Presence of conotruncal cardiac defects such as interrupted aortic arch, tetralogy of Fallot, truncus arteriosus, and pulmonary atresia with ventricular septal defect.
Recommended Tests: Subxiphoid 2-dimensional echocardiography is highly effective for diagnosing conotruncal malformations in infants, achieving correct diagnoses in 94% of cases 2.
Additional Markers: Laterality of the aortic arch and subclavian artery anomalies (aberrant origin, isolation, distal ductal origin, cervical origin) may indicate the presence of 22q11.2 deletion 1.Management
First-Line Treatments: Surgical interventions tailored to specific cardiac defects (e.g., repair of interrupted aortic arch, balloon valvuloplasty for pulmonary stenosis in tetralogy of Fallot).
Adjunctive Treatments: Comprehensive management including endocrinological support (thyroid function monitoring), audiological evaluations, and speech therapy due to potential associated anomalies 1.Special Populations
Pediatrics: Early diagnosis via subxiphoid echocardiography is crucial for timely surgical interventions 2.
Comorbidities: Attention to associated non-cardiac anomalies such as immune deficiencies, feeding difficulties, and developmental delays is essential 1.Key Recommendations
Screen patients with conotruncal cardiac malformations for 22q11.2 deletion using chromosomal analysis, particularly noting aortic arch laterality and subclavian artery anomalies as indicators 1 (Evidence: Moderate).
Utilize subxiphoid 2-dimensional echocardiography as a primary diagnostic tool in infants with suspected conotruncal malformations for accurate initial assessment 2 (Evidence: Strong).
Implement multidisciplinary care addressing cardiac, endocrine, audiological, and developmental aspects in patients diagnosed with 22q11.2 deletion syndrome 1 (Evidence: Expert opinion).References
1 Rauch R, Rauch A, Koch A, Zink S, Kaulitz R, Girisch M et al.. Laterality of the aortic arch and anomalies of the subclavian artery-reliable indicators for 22q11.2 deletion syndromes?. European journal of pediatrics 2004. link
2 Sanders SP, Bierman FZ, Williams RG. Conotruncal malformations: diagnosis in infancy using subxiphoid 2-dimensional echocardiography. The American journal of cardiology 1982. link90475-1)