Right ventricular function in patients with pulmonary hypertension; the value of myocardial performance index (Tei index) measured by tissue Doppler imaging. Tuj-hlth [Internet]. 2018 Sep. 9 [cited 2026 Aug. 30];39(3). Available from: https://journal.latakia-univ.edu.sy/index.php/hlthscnc/article/view/3873