Study aim: Determining and comparing the effects of lavender and chamomile scents on reducing anxiety in patients undergoing angiography. Design: The clinical trial has a control group with parallel and randomized groups, and Randomization Maine software was used for randomization. Settings and conduct: The population studied in this study includes all patients who are candidates for angiography with moderate to severe anxiety, referring to Prophet Azam Hospital, Bandar Abbas in 1403. The relevant intervention will be performed in the angiography department of Prophet Azam Hospital. After assigning individuals to groups, the level of latent and overt anxiety of individuals will be measured using the Spielberger questionnaire, and then 20 minutes after the intervention, the Spielberger questionnaire will be completed and collected again to measure the anxiety of the sample individuals. Participants/Inclusion and exclusion criteria: 1- Having informed consent 2- Age range 18 to 65 years 3- Having full consciousness 4- Absence of any allergy to medicinal plants 5- Patients who are candidates for coronary angiography for the first time 6- No other invasive procedures before angiography 7- Absence of taking sedatives 4 hours before the intervention Intervention groups: About an hour before angiography, for the lavender aromatherapy group, 2 drops of 10% lavender essential oil will be poured onto a piece of cloth and pinned 20 centimeters from the patients' noses. In the chamomile aromatherapy group, the same procedure will be performed, and in the placebo group, the same procedure will be performed with distilled water. Then, immediately 20 minutes after the intervention, the patients' anxiety level will be measured again, and finally, the results of the interventions before and after the intervention will be analyzed and compared. Main outcome variables: anxiety