Anxiety is a kind of agitation and concern stemming from the feeling of threat or hazard in human soul.

This study was monitored by triangular sequential analysis test.The samples consisted of 110 patients undergoing coronary artery angiography among whom 55 patients were randomly chosen to be allocated in the control group and 55 patients in experimental group.The demographic questionnaire,Spilburge's stat-trait anxiety inventory and digital indicator were used to collecting data.About one hour before angiography, the demographic past of the questionnaire was completed by the participants in both groups.Then sooting and no words music was played for the experimental group for 15 minutes.

The results of this study indicated that after the entrance of 80 patients in the fourth interim analysis in this study(41 in the test group and 39 in the control group), the clinical trial stopped in the interests of the test group(p=0.009 triangular test).the rate of anxiety stat and trait, systolic and diastolic blood pressure and respiratory rate of the test group after music intervention indicated statistically significant difference in contrast to the control group, based on the results the analysis of covariance test. But the difference between the heart rate in these two groups was not statistically significant)p=0.174).

The results obtained indicated the effect of music on coronary artery angiography anxiety.Therefor, it can be concluded that listening to music may be an assisting treatment for anxiety and its resulting physiological signs.