A friend was recently taken to the ER due to shortness of breath and chest pain, and was told she had coronary microvascular disease.  What is this, and how is it detected and treated?
D000319:Adrenergic beta-Antagonists / Q000627:therapeutic use; D000806:Angiotensin-Converting Enzyme Inhibitors / Q000627:therapeutic use; D017023:Coronary Angiography; D003327:Coronary Disease / Q000175:diagnosis* / Q000188:drug therapy / Q000503:physiopathology*; D006801:Humans; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors / Q000627:therapeutic use; D055806:Microvessels / Q000503:physiopathology*; D005996:Nitroglycerin / Q000627:therapeutic use
D000319:Adrenergic beta-Antagonists; D000806:Angiotensin-Converting Enzyme Inhibitors; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors; D005996:Nitroglycerin