Clinical Research Directory

Inclusion Criteria: * Patients \> 50 years of age referred for \[O15\]H2O-PET-MPI by the dept. of cardiology on clinical indication with symptoms suggestive of myocardial ischemia, primarily angina. * Willing to repeat the \[O15\]H2O-PET-MPI * Normal left ventricular ejection fraction (EF \> 45), as assessed from recent (max 1 year old) echocardiography description in medical journal. Exclusion Criteria: * Cardiovascular event in between scans (defined as hospitalization for cardiovascular event). * History of myocardial infarction * Regional perfusion deficits on the primary \[O15\]H2O-PET-MPI clinically suspected as a sign of significant coronary stenosis. * Unstable angina * Severe Chronic Obstructive Pulmonary Disease (COPD) * Severe asthma * Claustrophobia * Acute illness * Significant language barrier, estimated by the investigator not being able to understand the study information sufficiently.