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contentuptodate· Content· item f43_33_44560

©2013 UpToDate ® Print Email Mitral valve area from continuous wave Doppler A computer system, incorporated into current echocardiographic equipment, can automatically measure the P 1/2 time on the continuous wave Doppler tracing and compute the mitral valve area (MVA). In this case the P 1/2 time is 255 msec and the MVA is 220/255 or 0.86 cm 2 .