Chest x-ray, ECG, and echocardiogram are helpful to confirm the clinical opinion obtained from the patient’s history and relevant examination. In a few individuals with serious heart murmurs causing symptoms such as severe shortness of breath with or without heart failure, cardiac catheterization tests are invaluable to corroborate the findings on echocardiography. This is often done if surgical correction is planned. The technique of catheterization is outlined in the chapter Tests for Heart Diseases, and echocardiographic diagnostic points are given in the chapter Valve Diseases.