Background: Complexity of COPD and mortality from the disease is increased by co morbidities and exacerbations Objective: This study was conducted with aim to find the prevalence of cardiac co morbidity in COPD and its relation to severity staging of COPD. Methods: The present cross sectional study was done in Pulmonary Medicine outpatient department of Mahatma Gandhi Medical College and Research Institute, Pondicherry from March 2013 to June 2014. The study diagnosed and newly diagnosed of COPD patients were subjected to Pulmonary Function Test (PFT), assessment of blood pressure, electrocardiography and echocardiography. The statistical analysis was done to assess the cardiovascular status of the study subjects and its relation to severity staging of COPD. Results: In the total of 44 cases selected for study 42 (95.5%) were males and 2(4.5%) were females. On the basis of GOLD guidelines there were 5(11.4%), 13(29.5%), 16(36.4%) and 10(22.7%) mild, moderate, severe, and very severe COPD respectively. Right axis deviation, p-pulmonale, T-wave inversions, dominant R-wave, persistent S-wave in electrocardiography were present in 45.5%,52.6%,40.0%,33.3%,36.4% of severe and 54.5%, 36.8%, 60.0%, 58.3%, 63.6% in very severe cases of COPD. In echocardiography, right atrium and ventricle dilatation, left ventricular dysfunction, tricuspid regurgitation, and regional wall motion abnormalities were present in 55.6%, 46.15%, 50.0%, 37.5% of severe and 38.9%, 53.85%, 33.3%, 62.5% of very severe cases of COPD. Pulmonary artery systolic pressure and systemic hypertension increased with severity of COPD. Conclusion: Prevalence of cardiac co morbidities increases with the increase in severity of COPD. The severe and very severe stages of COPD are associated with significant cardiovascular diseases.