Shen H, Stacey BR, Applegate RJ, Zhao D, Gandhi SK, Kon ND, Kincaid EH, Pu M. Assessment of the prognostic significance of low gradient severe aortic stenosis and preserved left ventricular function requires the integration of the consistency of stroke volume calculation and clinical data. Echocardiography. 2020 01; 37(1):14-21.