Final answer:
Edema caused by cardiac problems can be determined through symptoms, medical tests, and obtaining a detailed medical history.
Step-by-step explanation:
Edema can be caused by cardiac problems. One way to determine if edema is caused by cardiac problems is to look for other symptoms associated with heart failure, such as shortness of breath, fatigue, and swollen ankles and legs. Another way to diagnose cardiac edema is through medical tests, such as an echocardiogram, which can show abnormalities in the heart's structure and function. Additionally, obtaining a detailed medical history, including any previous heart conditions or heart-related surgeries, can help in determining if the edema is caused by cardiac problems.