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.
Bicuspid aortic valve (BAV) disease is a defect that occurs during the formation of the aortic valve in the uterus. The aortic valve separates the left ventricle from the aorta and normally has three cusps, which open and close as the ventricle contracts and relaxes.In bicuspid aortic valve disease, the valve has two cusps.icuspid aortic valve disease is an abnormal formation of the aortic valve (the valve connecting the aorta to the heart).