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Background  Periprocedural myocardial injury (pMI) is a common complication of elective percutaneous coronary intervention (PCI) that reduces some of the beneficial effects of coronary revascularization and impacts the risk of cardiovascular events. We developed a 3-dimensional volumetric cardiovascular magnetic resonance (CMR) method to evaluate coronary high intensity plaques and investigated their association with pMI after elective PCI.    Methods  Between October 2012 and October 2016, 141 patients with stable coronary artery disease underwent T1-weighted CMR imaging before PCI. A conventional 2-dimensional CMR plaque-to-myocardial signal intensity ratio (2D-PMR) and the newly developed 3-dimensional integral of PMR (3Di-PMR) were measured. 3Di-PMR was determined as the sum of PMRs above a threshold of > 1.0 for voxels in a target plaque. pMI was defined as high-sensitivity cardiac troponin T > 0.07 ng/mL.    Results   pMI following PCI was observed in 46 patients (33%). 3Di-PMR was significantly higher in patients with pMI than those without pMI. The optimal 3Di-PMR cutoff value for predicting pMI was 51 PMR*mm 3  and the area under the receiver operating characteristic curve (0.753) was significantly greater than that for 2D-PMR (0.683,  P  = 0.015). 3Di-PMR was positively correlated with lipid volume (r = 0.449,  P  < 0.001) based on intravascular ultrasound.  Stepwise multivariable analysis showed that 3Di-PMR ≥ 51 PMR*mm 3  and the presence of a side branch at the PCI target lesion site were significant predictors of pMI (odds ratio [OR], 11.9; 95% confidence interval [CI], 4.6–30.4,  P  < 0.001; and OR, 4.14; 95% CI, 1.6–11.1,  P  = 0.005, respectively).    Conclusions  3Di-PMR coronary assessment facilitates risk stratification for pMI after elective PCI.    Trial registration  retrospectively registered.

journal of cardiovascular magnetic resonance

Three-dimensional assessment of coronary high-intensity plaques with T1-weighted cardiovascular magnetic resonance imaging to predict periprocedural myocardial injury after elective percutaneous coronary intervention