Abstract
Down syndrome (DS) is the most common autosomal chromosome abnormality with an estimated incidence of approximately 1.1 per 1000 live births, without significant differences across different races. Pulmonary hypertension (PH) can significantly affect the prognosis and quality of life of DS patients. While the most common cause of PH is congenital heart disease (CHD), DS is often associated with comorbidities that may cause or worsen PH.
In recent decades, new treatment strategies targeting pulmonary arterial hypertension (PAH) have greatly improved the clinical status of patients with PAH related to CHD (PAH-CHD). However, major clinical trials did not include DS patients, and, as a result, the efficacy of PAH-targeted therapies in this population remains largely unknown.
DS patients with PAH-CHD are a very complex population, posing major challenges in terms of diagnosis and prognosis. Tools and markers commonly used in the diagnostic workup of PAH are often difficult to apply to many DS patients, e.g. due to poor compliance to invasive or other investigations. For example, estimates of functional class and the validity of the 6-min walk test are still debated.
Given the complexity and presence of associated comorbidities, the management of DS patients with PAH-CHD requires a multidisciplinary approach and expert tertiary follow-up.
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Abbreviations
- AVSD:
-
atrioventricular septal defect
- CHD:
-
congenital heart disease
- DS:
-
Down syndrome
- ERA:
-
endothelin receptor antagonist
- PAH:
-
pulmonary arterial hypertension
- PH:
-
pulmonary hypertension
- RHC:
-
right heart catheterization
- VSD:
-
ventricular septal defect
- 6MWD:
-
six minute walk distance
- 6MWT:
-
six minute walk test
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D’Alto, M., Di Marco, G.M. (2017). Eisenmenger Syndrome in Patients with Down Syndrome. In: Dimopoulos, K., Diller, GP. (eds) Pulmonary Hypertension in Adult Congenital Heart Disease. Congenital Heart Disease in Adolescents and Adults. Springer, Cham. https://doi.org/10.1007/978-3-319-46028-4_18
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