There are two main reasons for doing this test: # To assess the significance of a stenosis (narrowing) in one or more of the coronary arteries that has been previously identified either by standard coronary angiography or CT coronary angiography. This is often used by cardiologists to determine if a coronary stenosis should be treated either by angioplasty or coronary bypass surgery. # To screen patients who have chest pain and risk factors for coronary artery disease, to assess for ischaemia which may be caused by a narrowing in one of the coronary arteries. This could then (if it shows ischaemia) be further investigated with another<unk>  modality to directly image the coronary arteries such as invasive coronary angiography. In contrast to the nuclear<unk>  modalities (PET and SPECT), CMR<unk>  does not involve the use of ionising radiation and can therefore be used multiple times without the risk to the patient of exposure to radiation. It is a non-invasive test, is generally regarded as a safe (see below) procedure and is well tolerated by patients (apart from people who suffer from claustrophobia)
Cardiac magnetic resonance imaging perfusion
Coronary CT calcium scan
Coronary CT angiography
Pressure–volume loop analysis in cardiology
ST2 cardiac biomarker
Cardiac electrophysiology
Impedance cardiography
Pulmonary angiography