Al-Rikabi, Zainab A., et al. “Evaluation of Myocardial Function in Cases of Gestational Hypertension Using Myocardial Performance Index”. Journal of the Faculty of Medicine Baghdad, vol. 59, no. 1, Apr. 2017, pp. 65-70, https://doi.org/10.32007/jfacmedbagdad.591168.