“Right ventricular function in patients with pulmonary hypertension; the value of myocardial performance index (Tei index) measured by tissue Doppler imaging”, Tuj-hlth, vol. 39, no. 3, Sep. 2018, Accessed: Jun. 16, 2026. [Online]. Available: https://journal.latakia-univ.edu.sy/index.php/hlthscnc/article/view/3873