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.
It is now recognized that approximately 50 percent of those born with a bicuspid aortic valve also have a dilated ascending thoracic aorta (the part of the aorta arising from the heart and going up the front of the chest).earn how physicians at the Massachusetts General Hospital Thoracic Aortic Center diagnose and treat thoracic aortic disease, a condition that affects the portion of the aorta that is in the chest and requires treatment from both cardiac and vascular specialists.