IRCT201101095578N1 IRCT 2012-10-05 Vice-Chancellor for Research, Shiraz University of Medical Sciences The effect of changes in patients' body positions on the back pain and hemodynamics The effect of continuity of change positioning during and after cardiac radiofrequency ablation on patients' back pain and hemodynamic status 2011-01-21 anticipated 75 Complete https://irct.ir/trial/5998 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Supportive. N/A Condition 1: patients that have cardiac arrhythmia. Condition 2: prolonged bedrest. Intervention 1: Patients in the control group received routine care including lying on their back for 6-8 hours (including duration of the procedure) with no change in their position. Intervention 2: Patients in intervention group A did lie on their back during the procedure with the head of their bed tilted up for 15 degree, using a small mattress (3×50×80 cm) under their body and their knee bent for 30 degrees using a small cylindrical pillow. In the first and second hours after the procedure, the continued lying on their back with the head of the bed tilted up for 30 and 45 degrees, respectively. During the two hours post procedure, a small pillow was placed alternatively every 30 minutes under right and left side of the body from shoulder to gluteal. Moreover, they continued to use the small cylindrical pillow under their knees. During the third hour, head of the bed was tilted up 30 degrees and the patients did lie on right and left side for 30 minutes each. Within the forth hour, the patients lied on their side (right or left) for 30 minutes with the head of the bed tilted up for 15 degrees followed by sitting for the next 30 minutes. Intervention 3: In case group B, the samples were positioned precisely like patients in group A during the procedure, and they were in the routine position after the procedure (without any alteration). The intensity of the back pain, blood pressure, heart rate, the amount of bleeding and hematoma were measured right after the patients entered the CCU and 2, 4, 6 and 24 hours after ablation in 3 groups.