title: Ask the doctor.  I am an 84-year-old man with atrial fibrillation, mild heart failure, and well-controlled high blood pressure.  My doctor had me wear a Holter monitor and get a SPECT scan (which showed mild nonischemic cardiomyopathy). Now he wants me to have a cardiac MRI.  What information would this test give that he doesn't already have?
authors.forename: Peter
authors.initials: P
authors.lastname: Zimetbaum
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000150:complications* / Q000628:therapy; D007722:Health Knowledge, Attitudes, Practice; D006333:Heart Failure / Q000150:complications* / Q000628:therapy; D006352:Heart Ventricles / Q000473:pathology*; D006801:Humans; D006973:Hypertension / Q000150:complications / Q000628:therapy; D008279:Magnetic Resonance Imaging / Q000379:methods* / Q000523:psychology; D008297:Male; D015899:Tomography, Emission-Computed, Single-Photon; D019564:Unnecessary Procedures