[Acute Mitral Regurgitation in Infant].

The acute mitral regurgitation of the infants are believed to be very rare until recently. However, there have been increasing number of reports of acute massive mitral regurgitation attributable to rupture of the chordae tendaniae escecially in Japan. If undiagnosed or the optimal treatment including surgery is delayed, it may cause cardiogenic shock and death in infants. Thus pediatricians, pediatric cardiologists and pediatric caridiac surgeons should consider this diagnosis when previously healthy infant suddenly develop cardiorespiratory collapse. It is very important to diagnose early and if there is over moderate mitral regurgitation, the 1st choice will be the mitral valve repair if possible. Pediatric cardiac suregon should be skilled at the mitral valve repair and mitral valve replacement. There are several techniques which are different from the adult operation, so pediatric cardiac surgeon also has to be prepared for these techniques including supraannular mitral valve replacement.