Younis, A.S., Khurshed, K.N. and Abdullah, A.K. 2013. Determination of aortic valve efficiency through vortex physical parameters in normal, regurgitate, and stenotic valve by using Doppler-mode echocardiography. Zanco Journal of Medical Sciences (Zanco J Med Sci). 17, 2 (Aug. 2013), 443–449. DOI:https://doi.org/10.15218/zjms.2013.0030.