Myocardial Flow Reserve and 99mTc-DTPA Cardiac Dynamic SPECT

Inclusion Criteria: * Age over 18 years * Patient clinically stable with known or suspected coronary disease * Patient referred to Caen University Hospital for a myocardial perfusion SPECT * Patient who accept to undergo subsequent additional cardiac dynamic SPECT using 99mTc-DTPA at rest and during pharmacological stress * Informed consent dated and signed * Affiliation to a social security system Exclusion Criteria: * Contraindication to dipyridamole (asthma, chronic obstructive pulmonary disease , pulmonary hypertension) * History of poor tolerance of dipyridamole injection * Cardiac arrhythmia (atrial fibrillation or frequent premature ventricular complex) * Left bundle branch block, cardiac pacemaker, or implantable automatic defibrillator * Recent history of myocardial infarction or unstable angina * Pregnancy or lactating women * Known obstructive renal or urinary disease * Age under 18 years or guardianship * Patient with an acute coronary syndrome or a coronary revascularization occurring between the conventional perfusion SPECT and the subsequent 99mTc-DTPA dynamic SPECT