Bicuspid aortic valve may not be diagnosed early in most cases as it causes no symptoms. However, over time this valve may begin to leak (regurgitation), become narrowed (stenosed), or has both of these. Calcification of the leaflets may happen. The narrowing of the valve causes the heart to pump harder. A leaky valve allows blood flow back into the heart after it has been pumped out, hence needing the heart to pump more blood forward. Both ways cause the heart to work harder which may lead to heart failure later in life. The symptoms of failing valves include difficulty in breathing, chest pain, fainting (syncope), heart murmur and fatigue.
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