Non-hypoxemic COPD patients with decreased pulmonary functions, without cardiac symptoms and comorbidities could have risks for atrial, ventricular arrhythmias regardless of dyspnea and smoking. A recent study at Ankara Atatürk Chest Diseases and Chest Surgery Research and Training Hospital, and Ibni Sina Hospital, Ankara University Faculty of Medicine, Turkey, which analysed 50 patients with COPD and 21 age-sex matched healthy controls to find that P-min, QTcmin, Tp-edisp, Tp-e/QT were significantly different from the control group. Additionally,  the research team also added that they observed significant correlations between pulmonary functions and Qtcmin, Qtc-max, p-min as well.