Not all heart problems are diagnosed using angiogram, explains Mayo Clinic. Other tests used to identify cardiac problems include echocardiogram, electrocardiogram, holter monitoring and cardiac computed tomography.
Echocardiogram is an ultrasound test that identifies problems with the structure of the heart, states Mayo Clinic. An electrocardiogram, sometimes called an EKG, records the signals transmitted by the electrical system of the heart. The test helps diagnose problems with the structure and electrical activity of the heart. Holter monitoring is similar to an EKG, except a person wears the holter monitor for up to 72 hours. The test helps identify rhythm abnormalities not diagnosed during an EKG. Cardiac computed tomography is a CT scan used to check for problems. While the patient lies inside the CT machine, an X-ray tube takes pictures of the inside of the patient's chest.