Current Clinical Applications and Next Steps for Cardiac Innervation Imaging

Area of Science:

• Cardiology
• Nuclear Medicine
• Autonomic Nervous System Imaging

Background:

• Autonomic innervation is vital for cardiac function regulation.
• ¹²³I-mIBG and PET tracers provide unique insights into sympathetic innervation, differing from standard cardiac assessment methods.

Purpose of the Study:

• To review the practical applications of sympathetic innervation imaging in diverse clinical scenarios.
• To discuss updated guidelines and emerging data on the risk stratification capabilities of these imaging modalities.
• To explore future directions and potential wider adoption in patient management.

Main Methods:

• Review of current literature and guidelines (e.g., ASNC, European).
• Analysis of data from studies like ADMIRE-HF, ADMIRE HFX, Japanese consortium, and PAREPET.
• Discussion of technological advancements, including CZT cameras and PET tracers.

Main Results:

• ¹²³I-mIBG and PET imaging demonstrate independent mortality risk reclassification, as shown in ADMIRE HFX.
• Findings are corroborated by international studies, confirming the prognostic value of adrenergic imaging.
• Newer imaging technologies and cameras offer potential for improved image quality and diagnostic accuracy.

Conclusions:

• Sympathetic innervation imaging with ¹²³I-mIBG and PET tracers is a powerful tool for risk stratification in cardiac disease.
• Ongoing research and technological advancements are paving the way for broader clinical implementation and enhanced patient management strategies.
• Potential applications include management of Ventricular Assist Devices (LVADs) and Ventricular Tachycardia (VT) ablation.