Right Atrial Angiosarcoma with Severe Biventricular Dysfunction and Massive Pericardial Effusion - Sabzi, Feridoun; Dadkhah, Heidar; Shojaei, Sharam; Mahdavi, Masoume; Poormotaabed, Alireza; Javid, Nasrin; Dabiri, Samsam (Acta Medica Iranica)