This is why plumbers use propane torches for soldering rather than soldering irons. Rosin core solder, which is better for soldering electrical connections, readily melts in the heat provided by a soldering iron and by using it, you avoid the damage that would result by pointing a flame at electrical components.
Mitral valve prolapse (MVP) is defined as an abnormal displacement of the mitral valve leaflets into the left atrium during ventricular systole.The condition was first described by John Brereton Barlow in 1966 and was subsequently termed mitral valve prolapse by John Michael Criley.itral valve prolapse (MVP) is defined as an abnormal displacement of the mitral valve leaflets into the left atrium during ventricular systole.
1 Valve prolapse is a bowing of a valve that causes some leaking and most often involves the mitral valve.  Endocarditis is an infection of the lining of the heart that may involve and destroy a heart valve.