If you suspect you may have a heart condition, then you should speak with a doctor about it before looking into testing. The doctor can look at your medical history and current symptoms to see if you should have a test done. If he or she determines that you should be tested, there are a number of tests the doctor may recommend and refer you for, such as a stress test, blood tests, chest X-rays, an electrocardiogram (ECG), holter monitoring, an echocardiogram, a CT scan, or an MRI. These tests can be very useful in diagnosing heart conditions.