the impact of listening to pleasant natural sounds on anxiety and physiologic parameters in patients undergoing coronary angiography a pragmatic quasirandomizedcontrolled trial objective this study aimed to investigate the impact of listening to pleasant natural sounds on anxiety and physiological parameters in patients undergoing coronary angiographymethods the present pragmatic quasirandomized controlled clinical trial was conducted on 130 patients undergone elective angiography the participants were randomly divided into two groups including a pleasant natural sounds group and a control group n12 65 per group spielbergers statetrait anxiety inventory was used to assess levels of anxiety the patients anxiety level and physiological parameters were measured at baseline before during immediately after and 20 min after coronary angiographyresults the mean level of anxiety was similar in both arms at baseline t 1317 df 128 p 0190 the intervention arm displayed significantly lower anxiety levels than the control arm during the intervention wilks lambda 011 pillais trace 089 p 0001 f 205 the physiological parameters systolic and diastolic blood pressure mean arterial pressure heart rate and oxygen saturation of both groups showed statistically significant differences p 005 over time and in groupby time interactionsconclusion as an effective nursing intervention presenting no sideeffects listening to pleasant natural sounds can be helpful in the management of anxiety