Chronic obstructive pulmonary disease is associated with significant cardiovascular morbidity and mortality. The effect of COPD on heart can be diagnosed early by Electrocardiography (ECG) and echocardiography. In this study, we tried to evaluate the different ECG and echocardiography changes in COPD and its correlation with disease duration and severity. Case control study done in Noida International Institute of Medical Science, Greater Noida in the department of medicine on both outpatient and inpatient patients, from January 2023 to December 2023. Studies include 100 cases of COPD of different severity. Echocardiographic and ECG evaluation in chronic obstructive pulmonary disease patients has been done and its co-relation with the severity of disease has been assessed. A total of 100 patients were recruited in our study and out of them, the number of patients with mild, moderate, severe, and very severe COPD were 26/100 = 26%, 32/100 = 32%, 16/100 = 16%, and 6/100 = 6%, respectively. On echocardiography 20 patients 20/100 = 20%, had normal study. Measurable tricuspid regurgitation (TR) was observed in 33 patients (33/100 = 33%). Most of the patients belonged to GOLD stage III (40%) and P-pulmonale was the most common ECG abnormality (60%). Other ECG findings were right axis deviation, right ventricular hypertrophy, incomplete right bundle branch block, and S1Q3T3 pattern.