Comparison of Different Methods to Estimate Cardiac Index in Pulmonary Arterial Hypertension. Issue 8 (20th August 2019) - Khirfan, Ghaleb; Ahmed, Mostafa K.; Almaaitah, Saja; Almoushref, Alla; Agmy, Gamal M.; Dweik, Raed A.; Tonelli, Adriano R.