Is it possible that an echo-cardiogram would miss right sided heart failure?

Yes, it is possible for an echocardiogram to miss right-sided heart failure, especially in early stages or if the heart's function appears normal during the examination. Factors such as poor image quality, operator experience, or the presence of other conditions may obscure signs of right-sided heart failure. Additionally, some patients may have subtle changes that do not show up clearly on an echocardiogram. Therefore, clinical correlation and possibly additional testing may be necessary for a comprehensive assessment.