Assessment of cerebral glucose metabolism in patients with heart failure by 18F-FDG PET/CT imaging

J Nucl Cardiol. 2022 Apr;29(2):476-488. doi: 10.1007/s12350-020-02258-2. Epub 2020 Jul 20.

Abstract

Background: To evaluate the cerebral metabolism in patients with heart failure (HF).

Methods: One hundred and two HF patients were prospectively enrolled, who underwent gated 99mTc-sestamibi single photon emission computed tomography (SPECT)/CT, cardiac and cerebral 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT. Fifteen healthy volunteers served as controls. Patients were stratified by extent of hibernating myocardium (HM) and left ventricular ejection fraction (LVEF) into 4 groups where Group1: HM < 10% (n = 33); Group2: HM ≥ 10%, LVEF < 25% (n = 34); Group3: HM ≥ 10%, 25% ≤ LVEF ≤ 40% (n = 16) and Group 4: LVEF > 40% (n = 19). The standardized uptake value (SUV) in the whole brain (SUVwhole-brain) and the SUV ratios (SUVR) in 24 cognition-related brain regions were determined. SUVwhole-brain and SUVRs were compared between the 4 patient groups and the healthy controls.

Results: SUVwhole-brain (r = 0.245, P = 0.013) and SUVRs in frontal areas, hippocampus, and para-hippocampus (r: 0.213 to 0.308, all P < 0.05) were correlated with HM. SUVwhole-brain differed between four patient groups and the healthy volunteers (P = 0.016) and SUVwhole-brain in Group 1 was lower than that in healthy volunteers (P < 0.05). SUVRs of Group 3 in frontal areas were the highest among four patient subgroups (P < 0.05).

Conclusions: Cerebral metabolism in the whole brain was reduced but maintained in cognition-related frontal areas in HF patients with HM and moderately impaired global left ventricular function.

Keywords: 18F-FDG PET; Heart failure; heart–brain axis; hibernating myocardium.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Fluorodeoxyglucose F18*
  • Glucose
  • Heart Failure* / diagnostic imaging
  • Humans
  • Positron Emission Tomography Computed Tomography
  • Positron-Emission Tomography / methods
  • Stroke Volume
  • Tomography, Emission-Computed, Single-Photon / methods
  • Ventricular Function, Left

Substances

  • Fluorodeoxyglucose F18
  • Glucose