Retrospective evaluation of laboratory and imaging results of patients diagnosed with pneumonia presenting to the emergency department of Süleyman Demirel University

Objective: The aim is to determine the short-term impact of frontal QRS-T angle and other clinical parameters on survival in pneumonia patients, define risk profiles early, and optimize treatment strategies. In the long term, we seek to fill gaps in the literature by investigating whether the frontal QRS-T angle is an independent prognostic factor in pneumonia patients and ensure its application in clinical settings. This study evaluates the impact of scoring systems , laboratory parameters , and imaging on prognosis and mortality, as well as the superiority of these scoring systems over each other. Materials and Methods: This study was conducted retrospectively, randomly, observationally, and at a single center in the Emergency Medicine Clinic of Süleyman Demirel University Medical Faculty. Files of patients diagnosed with pneumonia (J18) who were presented between September 1, 2022, and September 1, 2023, were reviewed, including those with complete records Findings: For F-QRS-T angle >67, the AUC was 0.729, with a sensitivity of 65.38% and specificity of 72.16% (p<0.001). For CURB-65 score >1, the AUC was 0.841 with sensitivity of 85.71% and specificity of 65.22% (p<0.001). For PSI score >108, the AUC was 0.887, sensitivity was 85.7%, and specificity was 81.9% (p<0.001). Conclusion: The average frontal QRS-T angle in pneumonia patients was measured at 62.60±48.91 degrees. These electrocardiographic parameters may be significant in clinical management. Patients with high CURB-65 and PSI scores exhibited significantly increased F-QRS-T angles and shorter QT intervals. F-QRS-T angle was significantly higher in deceased patients (p<0.001), indicating its association with poor prognosis. Cox regression analysis indicated that a one-unit increase in F-QRS-T angle increased mortality by 2.256 times, a one-unit increase in PSI by 5.886 times, and a one-unit increase in CRP by 1.003 times. Ultimately, PSI score, CURB-65 score, and F-QRS-T angle are critical prognostic factors in pneumonia patients.