“…Moreover, since published reports inevitably are weighed towards describing the unusual, the precise frequency of heart disease in the BB syndrome is unknown. The literature indicates a variety of heart malformations occurring predominantly in males [Blumel and Kniker, 1959;Moench, 1954;Spigolon et al, 1959;Canivez, 19541. Acquired heart disease, primarily hypertrophy of the left ventricle, was noted most frequently in association with renal disease and systemic hypertension [Anderson, 1945;Ross et al, 1956;Francke, 1950;Laha, 19581. In an attempt to determine a n unbiased estimate of cardiac involvement in the Bardet-Biedl syndrome we evaluated the cardiac status in affected members of three extended, highly inbred families with this syndrome.…”