Prognostische Bedeutung von hochsensitivem Troponin I bei normotensiven Patienten mit akuter Lungenembolie
by Niklas Guddat
Date of Examination:2025-05-20
Date of issue:2025-04-17
Advisor:PD Dr. Mareike K. Lankeit
Referee:PD Dr. Matthias Ebner
Referee:Prof. Dr. Sabine Blaschke-Steinbrecher
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Abstract
English
This study investigated the prognostic significance of high-sensitivity troponin I (hsTnI) in normotensive patients with acute pulmonary embolism (PE). The goal was to identify an optimized cutoff value for hsTnI for risk stratification and assess its diagnostic quality. Additionally, the study explored potential sex-based differences in the prognostic value of hsTnI and compared it to high-sensitivity troponin T (hsTnT). Patients enrolled in the Pulmonary Embolism Registry Göttingen from September 2008 to April 2018 were included, provided they were adults, treated at the University Medicine Göttingen, and had given written consent. High-risk patients as defined by the 2019 European Society of Cardiology guidelines, patients with severe acute cardio-pulmonary conditions as the primary cause of symptoms, and patients without hsTnI measurements were excluded. The study included 459 normotensive patients (241 women, 218 men; median age 69 years) with acute PE. The hsTnI plasma concentrations were determined using the ARCHITECT stat hsTnI assay. The receiver operating characteristic analysis established an optimized hsTnI cutoff of 16 pg/ml for predicting complications during hospitalization (i.e., cardiopulmonary resuscitation, catecholamine therapy, PE-related death). Patients with complications (4.8%) had significantly higher hsTnI levels than those without complications (57 pg/ml IQA: 22-197 vs. 15 pg/ml IQA: 10-86; p=0.030). The optimized cutoff was associated with an odds ratio (OR) of 6.5 (95% CI: 1.9-22.4) for complications and an OR of 3.7 (95% CI: 1.0-13.3) for hospital mortality. No significant sex-based differences in hsTnI levels or the optimized cutoff were found (17 pg/ml for women vs. 17 pg/ml for men, p=0.79). Risk stratification algorithms showed no difference in the prognostic value between hsTnI and hsTnT (p=0.68). The findings confirm the prognostic importance of hsTnI in normotensive patients with acute PE. The optimized cutoff of 16 pg/ml is a reliable predictor of complications and hospital mortality. Sex-specific differences and varying cutoffs do not seem necessary. Both hsTnI and hsTnT can be used equivalently for risk stratification in normotensive patients with acute PE.
Keywords: Troponin; Pulmonary embolism; prognosis; high-sensitivity Troponin I; high-sensitivity Troponin; embolism; thrombosis