Cardiovascular Anomalies in Williams Syndrome

Williams syndrome is a multisystem genetic disorder caused by a microdeletion at chromosome 7q11.23, resulting in elastin haploinsufficiency and a characteristic spectrum of cardiovascular anomalies. The most frequent lesion is supravalvar aortic stenosis, often accompanied by peripheral pulmonary artery stenosis, supravalvar pulmonary stenosis and coronary artery stenoses. Valvular abnormalities such as bicuspid aortic valve and mitral valve prolapse further compromise cardiac function, while coarctation of the aorta and systemic hypertension exacerbate left ventricular pressure overload. Histologically, diminished elastin and increased collagen deposition render arterial walls rigid, promoting progressive narrowing and predisposing to myocardial hypertrophy, ischaemia and, in severe cases, sudden cardiac death. Management entails early detection by echocardiography, tailored interventional balloon angioplasty or surgical patch angioplasty, and long-term surveillance to optimise outcomes and quality of life.

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Cardiovascular Anomalies in Williams Syndrome publication trend

The graph below shows the total number of articles in cardiovascular anomalies in williams syndrome across all publications each year (not limited to Nature Index journals).

Technical terms

Supravalvar aortic stenosis (SVAS): Narrowing of the ascending aorta above the sinuses of Valsalva, leading to left ventricular outflow obstruction.
Elastin haploinsufficiency: Reduction in elastin protein levels due to gene deletion, causing arterial wall rigidity and progressive stenosis.
Endocardial calcification: Deposition of calcium salts in the endocardium, reflecting severe myocardial injury or metabolic disturbance.
Patch angioplasty: Surgical enlargement of a stenotic vessel segment by sewing in a biocompatible patch to restore lumen diameter.
Peripheral pulmonary artery stenosis: Constriction of branch pulmonary arteries, elevating right ventricular afterload and impairing pulmonary perfusion.

References

1. The Williams-Beuren Syndrome—A Window into Genetic Variants Leading to the Development of Cardiovascular Disease. PLOS Genetics (2012).
2. Case Report: Rapid and progressive left ventricular endocardial calcification in an infant with Williams syndrome. Frontiers in Pediatrics (2024).
3. Assessment of three types of surgical procedures for supravalvar aortic stenosis: A systematic review and meta-analysis. Frontiers in Cardiovascular Medicine (2022).
4. Effectiveness and Safety of Different Patch Materials for Supravalvar Aortic Stenosis (Middle-Term Outcomes). Reviews in Cardiovascular Medicine (2024).