Mahdi SA, Mohammed NH, AL-Saffar HB. The effect of Valsalva maneuver on diastolic filling indices in patients with essential hypertension. J Fac Med Baghdad [Internet]. 2010 Apr. 4 [cited 2025 Apr. 25];52(1):13-8. Available from: https://www.iqjmc.uobaghdad.edu.iq/index.php/19JFacMedBaghdad36/article/view/1038