After radiofrequency catheter ablation of arrhythmias, patients have to bed rest for 4-6 hours to prevent bleeding and hematoma. However, such a rest may cause back pain in the patients .This study aimed to determine the effects of continuous change in body position during and after the radiofrequency ablation on the back pain and patient’s hemodynamic status. This is a quasi-experimental designed study. Seventy five participants with cardiac arrhythmias, aged 180-80 years who had no known history of back pain and bleeding disorders were randomly assigned to a control group, receiving no change in body position, group A subjected to changes in body position during and after ablation, and group B subjected to changes in body position after ablation. The intensity of pain, blood pressure, heart rate, and extent of bleeding and hematoma were measured. There was no significant difference among the groups in terms of demographic characteristics, blood pressure, heart rate, overall bleeding, hematoma at the entry into the coronary care unit. Compared to the control group, group A had a significantly lower pain score up to 6 hours after the procedure, and group B had a significantly lower pain score up to 4 hours after the procedure. Group B had a significantly higher pain score at 2, 4 and 6 hours post ablation than group A. Changing the body position during and after the ablation procedure would reduce or prevent the back pain without increasing the chance of bleeding and hematoma.