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Updated: Feb 8, 2026
10:46
MRI and PET in Mouse Models of Myocardial Infarction
Published on: December 19, 2013
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Automatic calculation of myocardial external efficiency using a single 11C-acetate PET scan
Hendrik J Harms1, Nils Henrik S Hansson2, Tanja Kero3
1Department of Nuclear Medicine, & PET Center, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200, Aarhus N, Denmark.
Summary
Myocardial external efficiency (MEE) can be accurately measured using a single 11C-acetate PET scan. This method shows reduced MEE in valvular heart disease, reflecting disease severity.
Area of Science:
- Cardiology
- Nuclear Medicine
- Biomedical Engineering
Background:
- Myocardial external efficiency (MEE) quantifies cardiac work relative to energy consumed.
- Current methods for MEE assessment are complex and often require ECG-gating.
- A novel, automated method using 11C-acetate PET without ECG-gating was developed.
Purpose of the Study:
- To develop and validate a fully automated method for estimating MEE using a single 11C-acetate PET scan.
- To assess MEE in healthy individuals and patients with aortic valve stenosis (AVS) and mitral valve regurgitation (MVR).
- To evaluate the association between MEE and clinical parameters of valvular heart disease.
Main Methods:
- A dual-center study included 10 healthy controls, 34 AVS patients, and 20 MVR patients.
- Metabolic rate of oxygen consumption (MVO2) was calculated from 11C-acetate kinetics.
- Forward cardiac output (FCO) and left ventricular mass (LVM) were automatically derived from dynamic PET imaging.
Main Results:
- The automated PET-derived MEE (MEE_PET) showed high correlation (r=0.85) with MEE derived from cardiac magnetic resonance (MEE_PET-CMR).
- MEE_PET was significantly lower in AVS (17.2%) and MVR (18.0%) patients compared to controls (23.6%).
- MEE_PET strongly correlated with NYHA class and the severity of valvular dysfunction.
Conclusions:
- A single 11C-acetate PET scan provides accurate and automated MEE measurements across different scanners.
- Automated MEE assessment using PET may offer an unbiased evaluation of the heart's response to valvular disease.
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