Anxiety and sleep disorders are among the most common symptoms in heart failure patients. In addition to pharmacological methods for anxiety and sleep disorders, non-pharmacological methods can also be used. Among these, anxiety and sleep disorders can be prevented with virtual reality glasses aimed at distraction. This study will be conducted to evaluate the effect of breathing exercises performed with virtual reality glasses on anxiety, sleep quality, and respiratory parameters. The study will be conducted with a total of 45 patients, 15 virtual reality glasses + breathing exercises, 15 breathing exercises, and 15 controls. Those in the virtual reality glasses + breathing exercises group will perform breathing exercises with virtual reality glasses once a day for 7 days. Those in the breathing exercises group will perform only breathing exercises once a day for 7 days. Anxiety, sleep disorders, and respiratory parameters of the patients will be examined.

Inclusion Criteria:

• 18 years of age or older,
• Verbal communication,
• Place and time oriented,
• Without any psychiatric illness,
• Patients diagnosed with HF with NYHA class III-IV symptoms,
• Left ventricular ejection fraction ≥50% (LVEF-CF/HFpEF), between 40-49% (SEF-CF/HFmrEF), HF below 40% (DEF-CF/HFrEF),
• High levels of natriuretic peptides (BNP>35 pg/mL and/or NTproBNP>125 pg/mL),
• There is no deformity or diagnosis related to the musculoskeletal system that may prevent breathing exercise,
• Chronic diseases such as hypertension (Stage 1 and 2 HT) and diabetes mellitus are stable and the treatment for these diagnoses has not been changed in the last month,
• Who have not previously received respiratory exercise training and have not participated in a rehabilitation program,
• Patients who volunteer to participate in the study will be included in the study

Exclusion Criteria:

• Life signs are so abnormal as to preclude intervention,
• Patients with migraine, vertigo, active nausea-vomiting, headache, dizziness will not be included in the study.