Unstable plaque, the primary cause of myocardial infarction, is characterized by distinct a
morphology including positive remodeling (PR), low attenuated plaque (LAP), napkin ring sign
(NRS), and spotty calcifications (SC) The purpose of the present study is to investigate the
influence of microvascular dysfunction and additional risk factors on plaque morphology and
plaque burden in patients with diabetes mellitus.