MALIGNANT LYMPHOMA DEMONESTRATING SICK SINUS SYNDROME AND SUPERIOR VENA CAVA SYNDROME - Forouzannia, S; Abdollahi, M; Mirhosseini, S; Moshtaghion, S; Hosseini, H; Jorat, M; Moeeni, M; Karimi-Zarchi, M (Acta Medica Iranica)