This type of study is a randomized controlled trial. The aim is to contribute to the literature by comparing the effects of heart yoga on the depression level, sleep and quality of life of patients who do and do not do heart yoga.

The main elements it aims to answer are:

• Heart yoga applied to patients who have undergone heart surgery improves their sleep quality compared to those who have not.
• Heart yoga applied to patients who have undergone heart surgery reduces the level of depression compared to those who have not.
• Heart yoga applied to patients who have undergone heart surgery increases the quality of life compared to those who have not.

Patients who accept the study will practice heart yoga simultaneously with heart yoga videos via an online link every other day for 12 weeks after heart surgery.

Researchers will compare intervention and control groups to see if there are any effects on sleep quality, depression level, and quality of life.

In order to collect the data of the study, Personal Information Form, Physiological Parameters, Pittsburgh Sleep Quality Index (PUKI), Beck Depression Inventory, World Health Organization Quality of Life Scale-Short Form were used to evaluate the individual characteristics of the patient and were collected from patients who underwent cardiovascular surgery. (Permission to use scale has been obtained.) The researcher received a certificate by participating in a national and international certified training program of 200 hours of basic yoga and 250 hours of yoga therapy training. The "Heart Yoga Guidance Booklet" was developed by the researcher in line with the guide prepared for the practice of heart yoga, the training received, literature reviews on the subject and clinical experiences. In line with this booklet, videos were created for patients to apply at home. It was easily accessible by providing an online link. In addition, a monitoring form was given every other day to ensure controlled follow-up of the patients.

The patients were randomized and the study started with patients who accepted the study. The suitability and clarity of the scales were checked with pre-application (n: 20).

In addition to routine nursing care, patients in the intervention group received heart yoga every other day for 70-80 minutes a day, starting from the 1st postoperative week until the end of the 12th week. The control group continued routine nursing care.

Evaluation scales were filled in by the patients before surgery, at the 1st week after surgery, at the 1st month after surgery, and finally at the 3rd month after surgery.

Research Inclusion Criteria

• Those who have undergone cardiovascular surgery,
• Those who are over 18 years old,
• Oriented to person, place and time,
• Extubated on the first day after surgery,
• Pain control was achieved before the application,
• Those who do not practice yoga or similar practices,
• No verbal communication disability (hearing and speaking),
• No physical mobility problems,
• No obstacle to using technology,
• Patients who volunteered to participate in the study were included in the study. Exclusion Criteria
• Having low blood pressure,
• The amount of drainage from the chest tube is excessive, which hinders cardiac yoga movements,
• Those who have conditions such as asthma, chronic obstructive pulmonary disease (COPD),
• Patients with diagnosed psychiatric and neurological disorders were excluded from the study.

Criteria for Exclusion from the Study

• Unable to communicate during the research process,
• Patients who wanted to leave the study during the research period were excluded from the study.