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Echocardiographic studies of left ventricular disease in Ullrich-Noonan syndrome
Insights
Echocardiography reveals significant left ventricular disease in Ullrich-Noonan syndrome, affecting up to 50% of patients. Careful echocardiographic diagnosis is crucial, noting differences from typical asymmetric septal hypertrophy.
Area of Science:
- Cardiology
- Medical Genetics
Background:
- Ullrich-Noonan syndrome (UNS) is a genetic disorder associated with various congenital anomalies.
- Cardiovascular involvement is common in UNS, but specific echocardiographic findings require further elucidation.
Purpose of the Study:
- To evaluate the spectrum of cardiovascular abnormalities in individuals with Ullrich-Noonan syndrome using echocardiography.
- To characterize left ventricular disease in UNS and its diagnostic implications.
Main Methods:
- Echocardiographic examinations were performed on individuals and families with Ullrich-Noonan syndrome.
- Analysis focused on identifying left ventricular disease, other cardiac abnormalities, and specific echocardiographic features.
Main Results:
- Previously undiagnosed left ventricular disease was identified in a significant proportion of UNS patients.
- The estimated frequency of heart disease in UNS is approximately 50%.
- Absence of systolic anterior motion of the mitral valve was a notable difference compared to typical asymmetric septal hypertrophy.
Conclusions:
- Left ventricular disease is a frequent cardiovascular manifestation of Ullrich-Noonan syndrome.
- Echocardiographic diagnosis requires caution due to atypical presentations of left ventricular disease in UNS.
- Pulmonary stenosis, a common lesion in UNS, should be considered in the assessment of potential septal thickening.
Abstract:
Echocardiography has been used for cardiovascular evaluation of individuals and families with Ullrich-Noonan syndrome. Previously undiagnosed left ventricular disease has been found as a discrete lesion or in association with other cardiac abnormalities. This raises the estimated frequency of heart disease in the Ullrich-Noonan syndrome to about 50%. Since left ventricular disease in this syndrome may not be entirely typical of asymmetric septal hypertrophy, caution should be exercised in the echocardiographic diagnosis. To date, one notable difference between the echocardiograms in these patients and other patients with asymmetric septal hypertrophy is the absence of systolic anterior motion of the mitral valve. Since the most common cardiac lesion the the Ullrich-Noonan syndrome is pulmonary stenosis, the potential for septal thickening produced by severe pulmonary stenosis must also be taken into account.