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MR pulmonary angiography in patients with pulmonary embolism and its correlation with right heart function and prognosis
WANG Mingfu  XU Wei 

Cite this article as: Wang MF, Xu W. MR pulmonary angiography in patients with pulmonary embolism and its correlation with right heart function and prognosis. Chin J Magn Reson Imaging, 2020, 11(12): 1178-1181. DOI:10.12015/issn.1674-8034.2020.12.022.


[Abstract] Objective: To investigate the characteristics of MR pulmonary angiography in patients with pulmonary embolism (PE) and its correlation with right heart function and prognosis assessment.Materials and Methods: A retrospective analysis was performed on 90 PE patients, who were divided into mild PE group, severe PE group, group with good prognosis and the group with poor prognosis according to their condition and prognosis. All patients underwent MR pulmonary angiography to calculate embolization score, perfusion defect score, right and left ventricular short axis maximum diameter ratio (RV/LV), and pulmonary artery diameter. To compare the features of MR pulmonary angiography in patients with different degrees of severity, as well as the differences in embolization score, perfusion defect score, RV/LV, and pulmonary artery diameter among different groups, and analyze their correlation, and analyze their prognostic value through ROC curve.Results: In mild PE patients, 254 segments (69.0%) of pulmonary artery branches showed blotchy and patchy filling defects by MR pulmonary angiography, which was significantly higher than that in severe PE group (P<0.05). MR angiography showed 306 pulmonary artery branches (95.6%) as subsegmental or segmental filling defects in the severe group, with a significantly higher incidence than that in the mild group (P<0.05). The embolization score, defect score, RV/LV and pulmonary artery diameter of severe PE group were significantly higher than those of mild PE group (P<0.05). The embolization score and defect score of the group with poor prognosis were significantly higher than that of the group with good prognosis (P<0.05). There was a significant positive correlation between embolization score and defect score, RV/LV, and pulmonary artery diameter (P<0.05). ROC curve analysis showed that the area under the curve of defect score and embolization score for PE prognosis were 0.911 (95% CI: 0.625—0.966) and 0.796 (95% CI: 0.800—1.000), respectively.Conclusions: MR pulmonary angiography can be used to evaluate the severity of PE, and it has a certain diagnostic value for the function and prognosis of right heart.
[Keywords] pulmonary embolism；magnetic resonance imaging；right ventricular function；pulmonary arteriography

WANG Mingfu* Departmengt of Radiology, the Third People’s Hospital of Hubei Province, Wuhan 430033, China

XU Wei Departmengt of Radiology, the Third People’s Hospital of Hubei Province, Wuhan 430033, China

*Correspondence to: Wang MF, E-mail: wangmingfu825@sina.com

Conflicts of interest   None.

Received  2020-08-25
Accepted  2020-11-15
DOI: 10.12015/issn.1674-8034.2020.12.022
Cite this article as: Wang MF, Xu W. MR pulmonary angiography in patients with pulmonary embolism and its correlation with right heart function and prognosis. Chin J Magn Reson Imaging, 2020, 11(12): 1178-1181. DOI:10.12015/issn.1674-8034.2020.12.022.

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