This study will be conducted in the Pulmonary Rehabilitation Treatment Room on the 6th floor of the Affiliated University Hospital. The acceptance conditions are: (1) treatment of chronic pulmonary obstructive pulmonary disease in the lung rehabilitation clinic, and (2) signing of the subject's consent; exclusion conditions: (1) tracheostomized patients, (2) patients who cannot perform conventional lung rehabilitation, (3) patients who use respirators at home.
The study is a prospective observational study. It is expected to include a total of 25 subjects. The study will be implemented for one year from the date of IRB adoption. Before performing PR treatment, performed the 6th and 12th Every month, routine lung function, six-minute walking tests, and non-invasive cardiac output measurements are performed. The main results are: cardiac hemodynamic parameters.