TY - JOUR
T1 - Prognostic value of positron emission tomography myocardial perfusion imaging beyond traditional cardiovascular risk factors
T2 - Systematic review and meta-analysis
AU - Siontis, Konstantinos C.
AU - Chareonthaitawee, Panithaya
N1 - Publisher Copyright:
© 2015 The Authors. Published by Elsevier Ireland Ltd.
PY - 2015/3/1
Y1 - 2015/3/1
N2 - Background: Despite substantive growth in utilization of positron emission tomography (PET) myocardial perfusion imaging (MPI), evidence on its prognostic value is limited. We aimed to comprehensively evaluate the prognostic literature of PET perfusion measures according to the most recent American Heart Association recommendations for assessment of novel cardiovascular biomarkers. Methods: We searched the literature for studies reporting associations of PET MPI measures and outcomes in patients with known or suspected coronary artery disease. We documented hazard ratios (HR) and 95% confidence intervals (CI) of association effects and quantitatively synthesized them with random-effects meta-analyses. Discrimination, calibration and risk reclassification after addition of PET MPI measures to standard prognostic models were documented. Results: We identified 20 eligible studies with median n. = 551 patients. In meta-analyses, the extents of ischemic and scarred myocardium were significantly associated with cardiac death. Meta-analyses of multivariate estimates for abnormal summed stress score ≥. 4 and myocardial perfusion reserve <. 2 revealed significant associations with major adverse cardiovascular events [HR (95% CI) 2.30 (1.53-3.44) and 2.11 (1.33-3.36), respectively]. Changes in model discrimination, calibration or risk reclassification were reported in 5 studies (8 prognostic evaluations). There were marginal improvements in discrimination based on C index and no improvements in model calibration. Net reclassification index ranged from 9.8% to 14.2% and risk classification was significantly improved in 4/5 prognostic evaluations. Conclusions: PET MPI measures were strongly associated with adverse patient outcomes. Risk classification was more consistently improved than discrimination and calibration after addition of PET MPI measures, but reporting of such metrics was overall limited.
AB - Background: Despite substantive growth in utilization of positron emission tomography (PET) myocardial perfusion imaging (MPI), evidence on its prognostic value is limited. We aimed to comprehensively evaluate the prognostic literature of PET perfusion measures according to the most recent American Heart Association recommendations for assessment of novel cardiovascular biomarkers. Methods: We searched the literature for studies reporting associations of PET MPI measures and outcomes in patients with known or suspected coronary artery disease. We documented hazard ratios (HR) and 95% confidence intervals (CI) of association effects and quantitatively synthesized them with random-effects meta-analyses. Discrimination, calibration and risk reclassification after addition of PET MPI measures to standard prognostic models were documented. Results: We identified 20 eligible studies with median n. = 551 patients. In meta-analyses, the extents of ischemic and scarred myocardium were significantly associated with cardiac death. Meta-analyses of multivariate estimates for abnormal summed stress score ≥. 4 and myocardial perfusion reserve <. 2 revealed significant associations with major adverse cardiovascular events [HR (95% CI) 2.30 (1.53-3.44) and 2.11 (1.33-3.36), respectively]. Changes in model discrimination, calibration or risk reclassification were reported in 5 studies (8 prognostic evaluations). There were marginal improvements in discrimination based on C index and no improvements in model calibration. Net reclassification index ranged from 9.8% to 14.2% and risk classification was significantly improved in 4/5 prognostic evaluations. Conclusions: PET MPI measures were strongly associated with adverse patient outcomes. Risk classification was more consistently improved than discrimination and calibration after addition of PET MPI measures, but reporting of such metrics was overall limited.
KW - Calibration
KW - Discrimination
KW - Myocardial perfusion imaging
KW - Positron emission tomography
KW - Prognosis
KW - Risk reclassification
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U2 - 10.1016/j.ijcha.2015.01.005
DO - 10.1016/j.ijcha.2015.01.005
M3 - Article
AN - SCOPUS:84930616628
SN - 2352-9067
VL - 6
SP - 54
EP - 59
JO - IJC Heart and Vasculature
JF - IJC Heart and Vasculature
ER -