Williams-Beuren syndrome: cardiovascular abnormalities in 20 patients diagnosed with fluorescence in situ hybridization.

Objective: To evaluate the cardiovascular findings and clinical follow-up of patients with Williams-Beuren syndrome.

Methods: We studied 20 patients (11 males, mean age at diagnosis: 5.9 years old), assessed for cardiovascular abnormalities with electrocardiography and Doppler echocardiography.