Multislice Spiral Computed Tomography and Cardiomyopathy

Inclusion Criteria: * patients scheduled to undergo coronary angiography, * etiologic diagnosis of idiopathic cardiomyopathy (defined by a left ventricle echographic ejection fraction ≤ 40 %, without anamnestic or electrocardiographic arguments in favour of coronary artery disease), * in sinus rhythm, * informed written consent. Exclusion Criteria: * allergy to iodine, * history of coronary artery bypass graft, * history of percutaneous coronary angioplasty, * history of myocardial infarction, * known coronary artery disease, * Q waves on the ECG, * unstable haemodynamic status, * urgent revascularisation or urgent valvular surgery, * heart rate \> 80 bpm (before MSCT), * pregnancy, * enrollment in another study. * severe renal or respiratory insufficiency.