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Figure 1: Graph comparing the pulse wave Doppler of mitral valve and pulmonary venous flow after 3 and 6 months of carvedilol treatment. (a) Pulmonary venous atrial reversal flow velocity; (b): The difference in the pulmonary vein atrial reversal duration and the mitral valve A wave (Pulmonary venous atrial reversal-mitral valve atrial filling velocity) duration

Figure 1: Graph comparing the pulse wave Doppler of mitral valve and pulmonary venous flow after 3 and 6 months of carvedilol treatment. (a) Pulmonary venous atrial reversal flow velocity; (b): The difference in the pulmonary vein atrial reversal duration and the mitral valve A wave (Pulmonary venous atrial reversal-mitral valve atrial filling velocity) duration