To collect data, having obtained the required permissions accompanied with the authorities’ agreement and cooperation, the researcher refers to the CCU, Post CCU, and internal cardiology units of the Chamran Hospital and extracts the list of patients with atrial fibrillation arrhythmia introduced by the cardiologist specialists in these units. Then, she talks to all patients having the inclusion criteria, and, in addition to introducing herself, she explains them the purpose of the study. Finally, the qualified samples for the study are simply selected, and, having acquired their written informed consent, we will include them in the study. The randomization is implemented as the following: the samples are given numbers from the list of random numbers, and, according to the numbers, the even ones are assigned to the experimental group and the odd ones are assigned to the control group. This task continues until the considered sample number is achieved.