The decision to have surgery also depends on what caused mitral regurgitation. It depends on whether it is caused by: A problem with the anatomy of the valve (primary regurgitation). Another heart problem (secondary regurgitation).
PCR (polymerase chain reaction) is a method to analyze a short sequence of DNA (or RNA) even in samples containing only minute quantities of DNA or RNA. PCR is used to reproduce (amplify) selected sections of DNA or RNA. Previously, amplification of DNA involved cloning the segments of interest into vectors for expression in bacteria, and took weeks. But now, with PCR done in test tubes, it takes only a few hours.
A polymerase chain reaction is a process that amplifies DNA sequences for identification. PCR applications and PCR testing are presented in this article. This process can identify negative HIV antibodies and help identify criminals.