Background: Right ventricular dysfunction (RVD) is considered a powerful predictor in patients with left ventricular dysfunction. So, we should evaluate right ventricular (RV) function in patients with cardiomyopathy to predict RVD and avoid progression of the disease. Due to the burden of disease, an easily utilized screening tool for identifying such patients would be helpful to facilitate assessment for advanced therapies. Aim of the work: to assess RVOT-TVI and its correlation with RV systolic function by different echocardiographic modalities in patients with dilated cardiomyopathy. Methods and study population: 70 cases (40 myopathic patients and 30 age and sex-matched healthy persons as a control group). All cases underwent complete TTE study to measure LV and RV dimensions, volumes and functions. In addition, TAPSE and RVFAC. RVOT-VTI is calculated. The LV and RV longitudinal strain was also assessed using 2D STE analysis. Results: This study included 70 individuals divided into two groups; G “I" represented 40 patients with cardiomyopathy and G “II" represented 30 age-and sex-matched healthy subjects as control. Patients with DCM had significantly increased RV volumes (p<0.001) and significantly lower RV systolic function. In addition, there was significant decreased RVOTTVI in cardiomyopathic patients group versus normal group. Moreover, The RVOT-VTI had a significant correlation with different indices of RV systolic function (RVEF (r=0.457, p<0.001), RV Sm (r = 0.495, p < 0.001) and 2D-RVGLS (r = 0.453, p<0.001), % FAC (r=0.398, p =0.001)). Conclusion: Right ventricular dysfunction is common in dilated cardiomyopathy. RVOT-VTI is a simple, non-invasive measure assess RV systolic function in cardiomyopathic patients.