Study on the Correlation between CT Pulmonary Artery Imaging and the Severity and Short-term Prognosis of Acute Pulmonary Embolism
Objective:To evaluate the relationship between CT parameters of pulmonary artery and car-diac function and 30-day adverse prognosis in patients with acute pulmonary embolism,and to provide infor-mation for rapid risk stratification in patients with acute pulmonary embolism.Methods:A total of 243 pa-tients who were diagnosed with acute pulmonary embolism by CTPA examination in our hospital and followed up for 30 days were retrospectively analyzed in this study.The ratio of the main pulmonary artery(MPA)to the aorta(AO),the maximum diameter of the left(LPA)and right(RPA)pulmonary artery,and the maxi-mum short diameter ratio between the right and left ventricles(RVD/LVD)were measured on the transverse axis image,and the height and volume of the pulmonary trunk were measured at the workstation.The patients were grouped according to 30-day prognosis,the severity of pulmonary embolism,and embolism type,and va-rious parameters were compared.Results:There were statistically significant differences between the two groups in terms of surgery or immobilization history,heart rate,pulmonary embolism type,and treatment methods(P<0.05);The LPA and RVD/LVD values in the poor prognosis group were greater than those in the good prognosis group(P<0.05);In the grouping based on the location and severity of the embolism,there were statistically significant differences between the two groups in terms of MPA/AO,MPA,RPA,LPA,PAV,PAOI,RVD/LVD,interventricular septal shift,and vena cava reflux(P<0.05);The ratio of right ventricular to left ventricular diameters(RVD/LVD)had the highest AUC value and specificity for pre-dicting moderate to severe pulmonary embolism.Conclusion:The ratio of right ventricular to left ventricular diameters(RVD/LVD)can be used as the primary indicator for daily assessment of the prognosis of acute pul-monary embolism.The volume of the pulmonary artery trunk(PAV)can serve as a new indicator for determi-ning the severity of acute pulmonary embolism.Additionally,MPA,RPA,LPA,vena cava reflux,and inter-ventricular septal shift have certain predictive values for the severity of pulmonary embolism,providing a more reliable basis for clinical personalized treatment plans.
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