Heart failure is a relatively common cardiac disease in our daily lives, and patients often exhibit symptoms such as shortness of breath, difficulty breathing, and fatigue. So, how should heart failure be diagnosed? Generally, the following are common tests: First, an echocardiogram. An echocardiogram is a very practical and non-invasive test that can determine the presence of heart valve diseases, cardiomyopathy, and other conditions, as well as assess the heart's pumping function; Second, blood tests. For example, blood tests for electrolytes and BNP, or brain natriuretic peptide, can determine the presence of heart failure; Third, chest CT or X-rays. These can identify manifestations of pulmonary congestion caused by heart failure.