Fig. 2From: Accessory mitral valve tissue that caused a left ventricular outflow tract obstruction: a case reporta Transaortic echocardiography pressure peak gradient, measured by continuous wave Doppler across the left ventricular outflow tract before surgery. b Transaortic echocardiography pressure peak gradient measured by continuous wave Doppler across the left ventricular outflow tract after surgery. Vmax, maximum flow velocity; Vmean, mean flow velocity; Max PG, maximum pressure gradient; Mean PG, mean pressure gradientBack to article page