Not sure: Not sure what this means. I have never heard of an extra heart valve. There are cases when a person is born with a quadricuspid aortic valve (one leaflet too many) and these valves generally develop issues over the person's lifetime, but I have not heard of an extra heart valve.
Answered 9/27/2020
6.4k views
Abnormal: It may affect the other valve and cause irregular heart beats and heart failure.
Answered 2/20/2016
5.1k views
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