Question: what is mibg myocardial scintigraphy?
Answer: The test in question is called 123I-Metaiodobenzylguanidine Myocardial (aka MIBG) scintigraphy. MIBG, the tracer, is an analog of norepinephrine. It binds to adrenergic nerve terminals of the postganglionic sympathetic nerve that innervate the heart muscle.