The theory is considered  constructivist  , meaning that , unlike nativist theories ( which describe cognitive development as the unfolding of innate knowledge and abilities ) or empiricist theories ( which describe cognitive development as the gradual acquisition of knowledge through experience ) , it asserts that we construct our cognitive ...
Introduction. The population frequency of a bicuspid aortic valve is â0.9% to 1.36%, 1â3 with a 2:1 male:female ratio. It is likely that the presence of a bicuspid aortic valve has a genetic basis, with the pattern of transmission in some families suggesting an autosomal dominant pattern of inheritance.
Another cohort study [ 3 ] looked at outcomes in patients with symptomatic and asymptomatic bicuspid valve disease (mean age 35 year, median 31, range 16â78). 642 patients were followed up for a mean of 9 years, again with a 10-year survival rate similar to the normal population (96%). O. Leone, E. Biagini, D. Pacini et al., âThe elusive link between aortic wall histology and echocardiographic anatomy in bicuspid aortic valve: implications for prophylactic surgery,â European Journal of Cardio-thoracic Surgery, vol. 41, no. 2, pp.