Prognostic value of cardiac inflammation in ST-segment elevation myocardial infarction: A 18 F-fluorodeoxyglucose PET/CT study

J Nucl Cardiol. 2021 Nov 12. doi: 10.1007/s12350-021-02858-6. Online ahead of print.

Abstract

Background: 18F-fluorodeoxyglucose (FDG) imaging is used to detect cardiac inflammation and predict functional outcome in acute myocardial infarction (MI). However, data on the correlation of post-MI acute cardiac inflammation evaluated by 18F-FDG imaging and major adverse cardiac events (MACE) are limited. Therefore, we sought to explore the prognostic value of cardiac 18F-FDG imaging in patients with acute ST-segment elevation MI (STEMI).

Methods: Thirty-six patients with STEMI underwent 18F-FDG positron emission tomography/computed tomography (PET/CT) 5 days after primary percutaneous coronary intervention. 18F-FDG activity in infarcted and remote regions, as well as peri-coronary adipose tissue (PCAT), were measured and expressed as the maximum standardized uptake value (SUVmax). Patients were followed to determine the occurrence of MACE.

Results: The infarcted myocardium had a higher 18F-FDG intensity than the remote area. Moreover, the PCAT of culprit coronary arteries showed a higher 18F-FDG uptake than that of non-culprit arteries. Multivariate Cox regression analysis showed that increased SUVmax of PCAT [HR 5.198; 95% CI (1.058, 25.537), P = .042] was independently associated with a higher risk of MACE.

Conclusions: Enhanced PCAT activity after acute MI is related to the occurrence of MACE, and 18F-FDG PET/CT plays a promising role in providing prognostic information in patients with STEMI.

Keywords: 18F-FDG; MACE; Myocardial infarction; PCAT; cardiac inflammation.