Patients in the experimental group will be included in the face-to-face Phase I rehabilitation program until discharge and in the Phase II telerehabilitation program and sleep hygiene training for 3 weeks after discharge. Respiratory exercises will be performed as part of the phase I rehabilitation program until the patients are discharged. In addition, active range of motion and mobility exercises in bed, sitting position and standing, increasing distance walking and stair ascent and descent training will be provided. During the sessions, the patient's vital signs and clinical status will be monitored with a finger pulse oximeter and a blood pressure measuring device according to the patient's perceived degree of difficulty (Borg Scale). As part of the Phase II telerehabilitation program, respiratory exercises, calisthenic exercises and gait training will be performed.

Patients in the control group will be included in the face-to-face Phase I rehabilitation program until discharge and no intervention will be made after discharge. Until the patients in the control group are discharged, respiratory exercises will be performed as in the experimental group within the scope of the phase I rehabilitation program. In addition, active range of motion and mobility exercises in bed, sitting position and standing, increasing distance walking and stair ascent and descent training will be provided. During the sessions, the patient's vital signs and clinical status will be monitored with a finger pulse oximeter and a blood pressure measuring device according to the patient's perceived degree of difficulty (Borg Scale).

Unlike the control group, the experimental group will be given a phase II telerehabilitation program and sleep hygiene training for 3 weeks after discharge. Within the scope of the Phase II telerehabilitation program, breathing exercises and calisthenic exercises will be performed at increasing intensity according to the patient's tolerance, 3 days a week for 3 weeks. In addition, walking training will be continued over increasing distances. In addition, it will be aimed to increase sleep quality by giving a sleep hygiene education brochure to the patients in the experimental group. During the sessions, the vital signs and clinical status of the patients will be monitored according to the severity level determined by the finger pulse oximeter device, digital blood pressure monitor, perceived difficulty level (Borg Scale) and maximum heart rate. In addition, patients will be kept in a diary to monitor their compliance with the treatment program.

The test is performed in a closed area, on a flat surface 30 meters long (every 3 meters is marked), under the supervision of a physiotherapist. Dyspnea and fatigue of the patients are questioned during the 6MWT and the values before and after the test are recorded. At the end of 6 minutes, the total distance walked by the patient is recorded in meters. Studies have shown that a 6-minute walking distance of less than 350 meters is a predictor of mortality in cardiopulmonary diseases.

This 12-question index helps to calculate the metabolic equivalent of task (MET) used in daily life. 1 MET represents the resting Oxygen consumption of a 40-year-old 70 kg person at rest, which is normally 3.5 ml/kg/min. According to this index; self-care, eating, dressing, going to the toilet, short walks inside the house, short walks outside, light housework, between 1-4 METs; climbing hills or stairs, fast walking, short jogging, heavier work at home, light sports, between 4-10 METs; Heavy sports such as swimming, tennis are evaluated above 10 METs. The approximate values obtained according to the answers to the questions asked are classified as follows; Excellent if >7 MET 4-7 MET is Moderate <4 MET indicates a poor or uncertain prognosis.

The Turkish version of the State Trait Anxiety Inventory (STAI) will be used to assess the anxiety level of the subjects. The STAI consists of 2 parts, the state anxiety scale and the trait anxiety scale, and a total of 40 questions. When answering the state anxiety scale, patients are asked to select one of the options 'not at all', 'a little', 'a lot' and 'completely' according to the severity of the feelings, thoughts and behaviors expressed by the items; when answering the trait anxiety scale, patients are asked to mark one of the options 'almost never', 'sometimes', 'most of the time' and 'almost always' according to the frequency of the feelings, thoughts and behaviors expressed by the items. High scores indicate a high level of anxiety. Turkish validity and reliability studies have been conducted.

The term echocardiography covers all imaging techniques in which the heart is examined with ultrasound, such as pulsed and continuous wave Doppler, color Doppler and tissue Doppler imaging (TDI: tissue doppler imaging). Echocardiography is an easily accessible, non-invasive, rapid and safe method that provides comprehensive information on cardiac anatomy (volumes, geometry, mass), wall motion and valve function.