Volume 56, Issue 3 pp. 779-789
Research Article

A Radiomic MRI based Nomogram for Prediction of Heart Failure with Preserved Ejection Fraction in Systemic Lupus Erythematosus Patients: Insights From a Three-Center Prospective Study

Lian-Ming Wu MD, PhD

Lian-Ming Wu MD, PhD

Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127 China

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Ruo-Yang Shi MD, PhD

Ruo-Yang Shi MD, PhD

Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127 China

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Chong-Wen Wu MD

Chong-Wen Wu MD

Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127 China

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Meng Jiang MD, PhD

Meng Jiang MD, PhD

Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127 China

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Qiang Guo MD, PhD

Qiang Guo MD, PhD

Department of Rheumatology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127 China

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Yin-Su Zhu MD

Yin-Su Zhu MD

Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nan Jing, Jiang Su, 210029 China

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Lang-Lang Tang MD

Lang-Lang Tang MD

Department of Radiology, Longyan First Hospital of Fujian Medical University, Long Yan, Fu Jian, 364031 China

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Jian-Rong Xu MD, PhD

Jian-Rong Xu MD, PhD

Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127 China

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Jun Pu MD, PhD

Jun Pu MD, PhD

Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127 China

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Yan Zhou MD, PhD

Corresponding Author

Yan Zhou MD, PhD

Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127 China

Address reprint requests to: Y.Z., Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, No. 160 Pu Jian Road, Shanghai, 200127, China. E-mail: [email protected] or R.W., Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, No. 160 Pu Jian Road, Shanghai, 200127, China. E-mail: [email protected].

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Rui Wu MD, PhD

Corresponding Author

Rui Wu MD, PhD

Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127 China

Address reprint requests to: Y.Z., Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, No. 160 Pu Jian Road, Shanghai, 200127, China. E-mail: [email protected] or R.W., Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, No. 160 Pu Jian Road, Shanghai, 200127, China. E-mail: [email protected].

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First published: 20 January 2022

Lian-Ming Wu and Ruo-Yang Shi contributed equally to the paper.

Abstract

Background

Myocardial T1 and extracellular volume (ECV) fraction values have important roles in the prognostication of heart failure with preserved ejection fraction (HFpEF). However, the traditional mean quantification of intensity levels is not sufficient.

Purpose

To evaluate a T1 map-based radiomic nomogram as a long-term prognosticator for HFpEF in systemic lupus erythematosus (SLE) patients.

Study Type

Prospective.

Population

A total of 115 SLE patients and 50 age- and gender-matched controls.

Field Strength/Sequence

A 3.0 T scanner; cine imaging, precontrast and post-contrast T1 mapping and T2 mapping sequences.

Assessment

A radiomic nomogram was developed based on precontrast T1 mapping. Three independent readers assessed and compared the ECV value and the value of the radiomic nomogram for predicting HFpEF in SLE patients.

Statistical Test

Cox proportional hazard models, Youden index for determining cut-off values for high HFpEF risk vs. low HFpEF risk classification, Kaplan–Meier analysis, intraclass correlation (ICC), and Uno C statistic test.

Results

During a median follow-up of 27 (interquartile range, 19–37) months, 31 SLE patients developed HFpEF. Patients with elevated ECV (≥31%) and a higher output (≥42.7) from the radiomic feature “S_33_sum average” of the precontrast T1 map had a significantly higher risk of developing HFpEF than those who had lower ECV (<31%) and an output <42.7. Patients with a higher “S_33_sum average” value on precontrast T1 map had a significantly increased risk for HFpEF (hazard ratio, 1.363, 95% CI, 1.130–1.645), after adjusting for covariates including ECV and LVEF. Finally, “S_33_sum average” from precontrast T1 mapping had modest but significantly incremental prognostic value over the mean ECV value (Uno C statistic comparing models, 0.860 vs. 0.835).

Data Conclusion

The precontrast T1 map-based radiomic nomogram, as a measure of diffuse myocardial fibrosis was associated with HFpEF and provided modest prognostic value for predicting HFpEF in SLE patients.

Evidence Level

1

Technical Efficacy

Stage 2

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