Iodine-based Extracellular Volume for Evaluating Myocardial Status in Patients Undergoing Percutaneous Coronary Intervention for Acute Myocardial Infarction by Using Dual-layer Spectral Detector Computed Tomography: a Comparison Study with Magnetic...

Overview

Journal Quant Imaging Med Surg

Specialty Radiology

Date 2022 Sep 5

PMID 36060604

Authors

Jing Liang

Hui Li

Jun Xie

Hongming Yu

Wenping Chen

Kejie Yin

Xingbiao Chen

Zhihong Sheng

Xin Zhang

Dan Mu

Affiliations

Soon will be listed here.

Abstract

Background: The myocardial status of patients who undergo percutaneous coronary intervention (PCI) must be evaluated accurately to enable treatment plans to be made for potential complications such as abrupt vessel closure, stent deformation, and myocardial chronic ischemia. This study examined the modality and clinical feasibility of iodine-based extracellular volume (ECV) assessment of the myocardium versus cardiovascular magnetic resonance (CMR) imaging in patients undergoing PCI.

Methods: In all, 21 patients who underwent PCI were prospectively enrolled in the study. All patients underwent follow-up cardiac dual-layer spectral detector computed tomography (SDCT) and CMR imaging after PCI. Myocardial ECV was quantified by either computed tomography (ECV) or magnetic resonance (ECV) using iodine or T-weighted mapping, respectively. The quality of SDCT and CMR images was independently assessed by two radiologists using a 4-point scale (1= poor and 4= excellent). Any patient with an image quality (IQ) score <2 was excluded. Consistency between radiologists was evaluated using intraclass correlation coefficients (ICC). Correlations between ECV and ECV values were analyzed using Pearson's test, and consistency was analyzed with Bland-Altman plots.

Results: Nineteen of 21 patients completed both cardiac CT and CMR examinations, while three patients were excluded after IQ assessment (two with poor CMR IQ; one with a discontinuous coronary artery on CT images). The mean (±SD) IQ scores for CT and CMR images were 3.81±0.40 and 3.25±0.58, respectively, and interobserver agreement was good (ICC =0.93 and 0.92 for CT and CMR, respectively). The mean (±SD) ECV and ECV values were 35.93%±9.73% and 33.89%±7.51%, respectively, with good correlation (r=0.79, P<0.001). Bland-Altman analysis showed a difference of 2.04% (95% CI: -9.56%, 13.64%) between the ECV and ECV values.

Conclusions: There is high correlation between iodine-based ECV and ECV values, which indicates that ECV is clinically feasible for evaluating the status of myocardial recovery in patients undergoing PCI.

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