On admission and at 14 day follow-up point, patients' weight, height and oxygen saturation will be measured and blood will be drawn for evaluation of complete blood count, chemistry, NT proBNP levels, troponin, C-reactive protein and venous blood gas. The patients will be asked to complete COPD assessment tool (CAT) questionnaire in order to quantify their health status. In addition, patients will undergo a chest X-ray, ECG, spirometry and two-dimensional echo-Doppler examination.