AbstractIntroduction: Corpulmonale is a synonym for pulmonary heart disease. It is traditionally defined as the right ventricular failure secondary to disorders that affect either the structure or function of the lungs. Aims and Objectives: To Study of Echocardiographic Changes In Patients with Chronic CorPulmonance. Methodology: The present study was conducted in Navodaya Medical College Hospital and Research Centre between January 2013 to December 2013, on patients selected from casesadmitted to medical wards. In the present study 50 patients selected from medical wards both male and female between 30 to 80 years suffering from chronic corpulmonale were evaluated with routine echo cardiography. All patients were subjected on admission to Two-dimensional echocardiography was done with ultrasound machine using 3.5 M Hz transducer. Recording was done in parasternal long axis view. Result: In the present study, majority of the patients were between 40 – 69 years and the mean age group was 55.3years.Male to female ratio observed was 11.5: 1.Right ventricular internal diameter at end systole (RVIDED) was in between the range of 3.4-4.0 cm in majority of the patients. The mean RVIDED is 3.7cm. Conclusion: On Echo the Right ventricular internal diameter at end systole (RVIDED) was found to be increased in Corpulmonale patients.Keywords: Echocardiography, CorPulmonance, Right ventricular internal diameter at end systole (RVIDED).