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.
Rating Newest Oldest. Best Answer: Both bicuspid and tricuspid valves are called atrio-ventricular valves. Since left ventricle beat with strong force than right ventricle, nature has designed bicuspid valve (mitral valve) to withstand more pressure of blood from the left ventricle.Source(s): http://en.wikipedia.org/wiki/Heart_valve...ating Newest Oldest. Best Answer: Both bicuspid and tricuspid valves are called atrio-ventricular valves. Since left ventricle beat with strong force than right ventricle, nature has designed bicuspid valve (mitral valve) to withstand more pressure of blood from the left ventricle.