Introduction: Chronic obstructive pulmonary disease (COPD) is a common respiratory condition characterized by airflow limitation it affects more than 5% of the population and is associated with high morbidity and mortality. It is the third common cause of death worldwide, killing around 1.2 Lakh, individuals each year. As a consequence of its high prevalence and chronicity, COPD causes high healthcare expenditure with frequent hospitalizations due to acute exacerbations and the need for long term therapy (eg, supplemental oxygen therapy, medication). Aims: The aim of this study is to evaluate right ventricular function in patients with COPD by echocardiography. Materials and methods: The present study was a Descriptive and cross-sectional case control study. This Study was conducted from April, 2021to November, 2022 at Indoor and outdoor patients of medicine, chest medicine, cardiology department of NRS Medical College, Kolkata. Total 100 patients were included in this study. Result: RV function were significantly impaired in COPD patients as compared to controls. Clinical deterioration in COPD group was much more in patients with baseline abnormal RV function (89%) and patients with RV systolic pressure ≥35 mmHg (P = 0.018). All the six patients who died had three or more abnormal RV systolic function parameters