A tropical climate can be observed in Nicaragua. Just as in the other Central American countries, there are two seasons: the dry and the raining season. During the dry season (January - June) there is virtually no rain and trees and plants start to dry out.
Causes of aortic valve regurgitation include: 1  Congenital heart valve disease. 2  You may have been born with an aortic valve that has only two leaflets (bicuspid valve) or fused leaflets rather than the normal three separate leaflets. 3  This puts you at risk of developing aortic valve regurgitation at some time in your life.
Aortic valve stenosis is narrowing of the aortic valve. Many things can narrow this passageway between your heart and aorta. Causes of aortic valve stenosis include: Congenital heart defect. The aortic valve consists of three tightly fitting, triangular-shaped flaps of tissue called leaflets. Some children are born with an aortic valve that has only one (unicuspid), two (bicuspid) or four (quadricuspid) leaflets â not three.