in hhd , the prolonged lv isovolumic relaxation time , measured from the onset of the aortic component of the second heart sound to the beginning of the mitral valve opening , decreased significantly from 112 +/- 17 to 90 +/- 9 msec ( p less than 0.01 ) and normalized lv peak filling rate during rapid filling phase increased in all pts without a statistic significance .
C0026264
mitral valve
C0225897
lv