Breath Analysis and Arterial Stiffness in Patients With Respiratory Diseases

Inclusion Criteria: 1. Written informed consent to participate in the study; 2. Age 18 and over; 3. Clinical diagnosis of one of chronic respiratory diseases (COPD, bronchial asthma, cystic fibrosis, lymphangioleiomyomatosis, hypersensitivity pneumonitis or other interstitial lung disease). Exclusion Criteria: 1. Unable to sign informed consent; 2. Respiratory disease (for controls); 3. Mental illness (severe dementia, schizophrenia, severe depression, manic-depressive psychosis); 4. Acute coronary syndrome, acute cerebrovascular accident, pulmonary embolism within the last 3 months; 5. Oncology; 6. Previous lung transplantation (for patients with respiratory diseases); 7. Diseases and conditions that can change the ECG picture and complicate the analysis of the ECG (conduction disturbance, pacemaker); 8. Inability to use a heart monitor (congenital developmental anomalies, traumatic amputation of the upper limbs, essential tremor, Parkinson's disease); 9. Pregnancy.