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Systemic inflammation and oxidative stress contribute to acute kidney injury after transcatheter aortic valve implantation
Affiliations- Renal Section, Department of Medicine, Hammersmith Hospital Campus, Imperial College London, United Kingdom
- Department of Cardiology, King’s College Hospital and King’s College London, British Heart Foundation Centre, London, United Kingdom
- Department of Anaesthesia, King’s College Hospital and King’s College London, British Heart Foundation Centre, London, United Kingdom
- Department of Cardiothoracic Surgery, King’s College Hospital and King’s College London, British Heart Foundation Centre, London, United Kingdom
- Department of Cardiology, Medical University of Gdansk, Poland
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Abstract
Background: Acute kidney injury (AKI) is a frequent complication of transcatheter aortic valve implantation (TAVI) and has been linked to preexisting comorbidities, peri-procedural hypotension, and systemic inflammation. The extent of systemic inflammation after TAVI is not fully understood. Our aim was to characterize the inflammatory response after TAVI and evaluate its contribution to the mechanism of post-procedural AKI.
Methods: One hundred and five consecutive patients undergoing TAVI at our institution were included. We analyzed the peri-procedural inflammatory and oxidative stress responses by measuring a range of biomarkers (including C-reactive protein [hsCRP], cytokine levels, and myeloperoxidase [MPO]), before TAVI and 6, 24, and 48 hours post-procedure. We correlated this with changes in renal function and patient and procedural characteristics.
Results: We observed a significant increase in plasma levels of pro-inflammatory cytokines (hsCRP, interleukin 6, tumor necrosis factor alpha receptors) and markers of oxidative stress (MPO) after TAVI. The inflammatory response was significantly greater after transapical (TA) TAVI compared to transfemoral (TF). This was associated with a higher incidence of AKI in the TA cohort compared to TF (44% vs. 8%, respectively, p < 0.0001). The incidence of AKI was significantly lower when N-acetylcysteine (NAC) was given peri-procedurally (12% vs. 38%, p < 0.005). In multivariate analysis, only the TA approach and no use of NAC before the procedure were independent predictors of AKI.
Conclusions: TAVI creates a significant post-procedural inflammatory response, more so with the TA approach. Mechanisms of AKI after TAVI are complex. Inflammatory response, hypoperfusion, and oxidative stress may all play a part and are potential therapeutic targets to reduce/prevent AKI.
Abstract
Background: Acute kidney injury (AKI) is a frequent complication of transcatheter aortic valve implantation (TAVI) and has been linked to preexisting comorbidities, peri-procedural hypotension, and systemic inflammation. The extent of systemic inflammation after TAVI is not fully understood. Our aim was to characterize the inflammatory response after TAVI and evaluate its contribution to the mechanism of post-procedural AKI.
Methods: One hundred and five consecutive patients undergoing TAVI at our institution were included. We analyzed the peri-procedural inflammatory and oxidative stress responses by measuring a range of biomarkers (including C-reactive protein [hsCRP], cytokine levels, and myeloperoxidase [MPO]), before TAVI and 6, 24, and 48 hours post-procedure. We correlated this with changes in renal function and patient and procedural characteristics.
Results: We observed a significant increase in plasma levels of pro-inflammatory cytokines (hsCRP, interleukin 6, tumor necrosis factor alpha receptors) and markers of oxidative stress (MPO) after TAVI. The inflammatory response was significantly greater after transapical (TA) TAVI compared to transfemoral (TF). This was associated with a higher incidence of AKI in the TA cohort compared to TF (44% vs. 8%, respectively, p < 0.0001). The incidence of AKI was significantly lower when N-acetylcysteine (NAC) was given peri-procedurally (12% vs. 38%, p < 0.005). In multivariate analysis, only the TA approach and no use of NAC before the procedure were independent predictors of AKI.
Conclusions: TAVI creates a significant post-procedural inflammatory response, more so with the TA approach. Mechanisms of AKI after TAVI are complex. Inflammatory response, hypoperfusion, and oxidative stress may all play a part and are potential therapeutic targets to reduce/prevent AKI.
Keywords
severe aortic stenosis, transcatheter aortic valve implantation, acute kidney injury, systemic inflammation
About this articleTitle
Systemic inflammation and oxidative stress contribute to acute kidney injury after transcatheter aortic valve implantation
Journal
Issue
Article type
Original Article
Pages
824-835
Published online
2020-12-01
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4896
Article views/downloads
1133
DOI
Pubmed
Bibliographic record
Cardiol J 2022;29(5):824-835.
Keywords
severe aortic stenosis
transcatheter aortic valve implantation
acute kidney injury
systemic inflammation
Authors
Arunraj Navaratnarajah
Amit Bhan
Emma Alcock
Tracy Dew
Mark Monaghan
Ajay M. Shah
Olaf Wendler
Philip MacCarthy
Rafal Dworakowski
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