IRCT2015122922682N4 IRCT 2016-05-28 Vice Chancellor for Research, Gonabad University of Medical Sciences The effect of combined aromatherapy on sleep quality in cardiac patients The effect of combined aromatherapy on sleep quality in hospitalized patients with Acute coronary syndrome (ACS) in cardiac care unit 2016-04-13 anticipated 60 Complete https://irct.ir/trial/19514 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Other design features: Samples based on permutation blocks (four blocks) will be divided into two experimental and control groups. It will be listed according to six possible ways (AABB, ABAB, ...) randomly that will determine the required number of blocks and arrange them into groups based on experimental (B) and control (A). For blinding the questionnaire will be completed by a person who is not aware of the research unit in the control group or the experimental group. N/A Sleep Quality. Intervention 1: Intervention group: For three consecutive nights at 09:00 pm, with the supervision of researchers, patients will be exposed to a combination of essential oils of lavender, chamomile and neroli, with 6, 2, 0.5 ratio. A Pharmaceutical company will prepare them in Gorgan. Essential oil will be dropped on a cotton ball, then the Cotton will be hold near the nose of the patients and ask them to close their eyes and take ten deep breaths. After that the cotton will be attached to the collar of the patient by a pin and detached after waking up. The standard Hospital Sleep Questionnaire, Verran and Snyder-Halpern will be completed before and after the intervention. Intervention 2: Control group: During the three nights of stay in the ward only routine treatments will be carried out without any intervention by the researchers. The Standard Hospital Sleep Questionnaire, Verran and Snyder-Halpern will be completed before and after.