Cardiac Troponin I (cTnI) Dynamics After Lung Transplantation and Its Consequences for Early Postoperative Management
Stefan Kuhnert1, Janine Sommerlad1, Merlin Moritz Seibert1
1Department of Internal Medicine II, University Hospital Giessen and Marburg, Justus-Liebig-University Giessen, Giessen, Germany.
Insights
Cardiac troponin I (cTnI) elevation is common after lung transplantation (LuTX). While not initially prognostic, a failure of cTnI to decrease post-LuTX may signal increased mortality risk.
Area of Science:
- Cardiology
- Thoracic Surgery
- Transplantation Medicine
Background:
- Myocardial injury indicated by elevated cardiac troponin I (cTnI) is frequent post-cardiac or thoracic surgery.
- Cardiac troponin I is routinely monitored post-lung transplantation (LuTX), but its prognostic significance requires further elucidation.
Purpose of the Study:
- To investigate the dynamics of cTnI levels after LuTX.
- To assess the prognostic value of cTnI in LuTX recipients.
- To identify potential risk factors for elevated cTnI post-LuTX.
Main Methods:
- Retrospective analysis of 151 adult LuTX patients (2005-2022).
- Evaluation of cTnI levels and dynamics at four postoperative time points.
- Correlation analysis with LuTX outcomes and risk factors.
Main Results:
- Elevated cTnI was common early post-LuTX, peaking 5-8 hours postoperatively, but lacked independent prognostic value.
- A failure of cTnI levels to decrease postoperatively correlated with higher mortality risk.
- cTnI levels showed weak positive correlations with mechanical ventilation duration and ICU length of stay.
Conclusions:
- Elevated cTnI levels post-LuTX may influence patient outcomes.
- Larger, multi-center studies are necessary to definitively establish the prognostic impact of cTnI after LuTX.
Background:
Myocardial injury with elevated cardiac troponin I (cTnI) is common after cardiac or even thoracic surgery and may indicate impaired prognosis. While cTnI has been monitored after lung transplantation routinely (LuTX), its relevance is to be elucidated. Therefore, this study focused on cTnI dynamics and its prognostic value after LuTX.
Methods:
This retrospective study analyzed data from 151 adult patients who underwent a LuTX at a single German lung center between 2005 and 2022. It focused on cTnI levels and dynamics at four postoperative time points, their impact on LuTX outcomes, and possible risk factors for elevated cTnI.
Results:
Elevated cTnI above the upper limit of normal was a regular finding early after LuTX without independent prognostic value, peaking 5-8 h postoperative. However, a failure to subsequently decrease may indicate a higher risk of mortality. Patients' cTnI levels showed weak positive correlations with duration of mechanical ventilation and length of stay in the intensive care unit.
Discussion:
Elevated cTnI levels after LuTX might impact patient outcomes. However, larger multi-center studies are needed to conclusively determine their impact.
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