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.
Thus, not all patients with aortic sclerosis go on to develop obstructive aortic valve disease; this occurs at a rate of about 10% within 5 years. 2 Congenital bicuspid aortic stenosis is a major common cause of aortic stenosis; the approximate overall incidence of an anatomic bicuspid aortic valve is 1% to 2% of the population.