Prognostic value of phase analysis on gated single photon emission computed tomography in patients with cardiac sarcoidosis

• Published in: Journal of nuclear cardiology 2021-02, Vol.28 (1), p.128-136
• Main Authors: Koyanagawa, Kazuhiro, Naya, Masanao, Aikawa, Tadao, Manabe, Osamu, Kuzume, Masato, Ohira, Hiroshi, Tsujino, Ichizo, Tamaki, Nagara, Anzai, Toshihisa
• Format: Article
• Language: English
• Subjects: 18F- fluorideoxyglucose positron emission tomography-computed tomography; Aged; Cardiac sarcoidosis; Cardiac-Gated Single-Photon Emission Computer-Assisted Tomography; Cardiology; Cardiomyopathies - diagnostic imaging; Cardiomyopathies - physiopathology; Electrocardiography-gated single-photon emission computed tomography; Female; Fluorodeoxyglucose F18; Humans; Imaging; Major adverse cardiac events; Male; Medicine; Medicine & Public Health; Middle Aged; Myocardial Perfusion Imaging; Nuclear Medicine; Original Article; Phase analysis; Positron Emission Tomography Computed Tomography; Predictive Value of Tests; Prognosis; Radiology; Radiopharmaceuticals; Retrospective Studies; Sarcoidosis; Sarcoidosis - diagnostic imaging; Sarcoidosis - physiopathology; Stroke Volume - physiology; Tomography
• ISSN: 1071-3581; 1532-6551
• DOI: 10.1007/s12350-019-01660-9

We aimed to determine the correlation between phase analysis, reflecting the heterogeneity of perfusion defects, and the dyssynchrony of the left ventricle wall motion, and adverse cardiac events in cardiac sarcoidosis (CS) patients. Fifty-seven consecutive patients with diagnosed CS (64 [IQR 55–71] years old, 14 males), who underwent 18F-FDG PET/CT and ECG-gated SPECT, were studied. FDG PET was analysed to measure cardiac metabolic volume (CMV), and total lesion glycolysis (TLG). The SPECT findings, such as LVEF, Summed Rest Score (SRS), bandwidth (BW) were evaluated. The median of BW was 56° (IQR 40–95). BW showed a strong inverse correlation with LVEF (r = − 0.60, P < 0.0001), and positive correlation with SRS (r = 0.82, P < 0.0001). However, there were no significant correlations between BW and CMV or TLG. The Kaplan–Meier curves revealed a significantly higher rate of MACE in the high BW group (BW > 56°) than the low BW group (BW ≤ 56°) (15.1%/years vs. 4.4%/years, P = 0.025). In multivariable analysis, BW was a significant independent predictor of MACE (P = 0.015). Phase analysis on gated SPECT was a significant and independent predictor of MACE in patients with CS.