Primary Outcome Measures:
Secondary Outcome Measures:
Patients with a confirmed diagnosis of COPD were examined regarding chronic heart failure.
- An interview regarding symptoms: breathlessness, orthopnoea, night cough, nocturia, walking distance.
- Physical examination: weight and height, heart and lung auscultation, blood pressure measurement after 5 minutes' rest in the sitting position and the presence of peripheral oedema.
- Natriuretic peptide- NT-proBNP (Immulite 2500, Siemens Healthcare Diagnostics AB Sweden).
- Patients with the NT-proBNP level of > 1200 pg/ml were referred for echocardiography to assess left ventricular function.