01.08.2006 | Editorial commentary
Will innervation imaging predict ventricular arrhythmias in ischaemic cardiomyopathy?
Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging | Ausgabe 8/2006
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With the introduction of 123I-metaiodobenzylguanidine (MIBG), evaluation of cardiac innervation and denervation has become feasible with SPECT. MIBG is a noradrenaline analogue, and has storage, transport and uptake characteristics similar to those of noradrenaline in sympathetic nerve endings. Uptake and retention of MIBG occur via two pathways: a neuronal pathway and a non-neuronal pathway. The neuronal pathway (uptake-1) consists of active transport sites on presynaptic nerve terminals, whereas the non-neuronal pathway (uptake-2) entails carrier-facilitated transport, mostly into other cell types. Diffusion only accounts for a small portion of the uptake and retention. In humans, the majority of uptake and retention is thought to occur via the neuronal pathway. …Anzeige