High Quality Content by WIKIPEDIA articles! Ramtin cardio-vascular research and treatment center, is a specialist cardio-vascular hospital located in Velenjak, northern Tehran, Iran. Professor Alireza Esmat, cardiovascular and cardiothoracic surgeon, has been performing open heart heart surgery at Ramtin since the hospital opened in 1995. With 80 beds, including 15 ICU beds and three operating theatres, the private hospital also runs a transplant research unit.