Assessment of Global and Regional Left Ventricular Function by Electrocardiographic Gated N-13 Ammonia Positron Emission Tomography in Patients With Coronary Artery Disease

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Background Electrocardiographic gated 13N-ammonia positron emission tomography (PET) enables simultaneous assessment of myocardial blood flow and left ventricular (LV) function. The aim of this study was to assess the accuracy of gated ^<13>N-ammonia PET for evaluating global and regional LV function in patients with coronary artery disease (CAD) in comparison with conventional left ventriculography (LVG). Methods and Results Fifty-four patients with CAD underwent gated ^<13>N-ammonia PET and LVG. The LV end-diastolic and end-systolic volumes (LVEDV, LVESV) and ejection fraction (LVEF) by gated ^<13>N-ammonia PET were calculated using Cedars-Sinai automated quantitative gated single photon emission computed tomography (QGS) and compared with those obtained by LVG. The regional wall motion (RWM) was visually scored, and compared with that on LVG. There were good correlations between the 2 methods for LVEF, LVEDV and LVESV (R=0.828, R=0.821 and R=0.874 respectively). The RWM assessed by gated ^<13>N-ammonia PET also agreed well with that by LVG (complete agreement was 70.4%, κ=0.58). Conclusions Gated ^<13>N-ammonia PET combined with QGS works reasonably well for the assessment of both global and regional LV function in CAD patients, although additional calibration may be necessary.
社団法人日本循環器学会の論文
2005-01-20