Question: how to check if you have heart failure?
Answer: Blood tests. Your doctor may take a blood sample to look for signs of diseases that can affect the heart. ... 
Chest X-ray. ... 
Electrocardiogram (ECG). ... 
Echocardiogram. ... 
Stress test. ... 
Cardiac computerized tomography (CT) scan. ... 
Magnetic resonance imaging (MRI). ... 
Coronary angiogram.