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DOI: 10.1055/a-2454-9020
Lactate Dehydrogenase Levels after Aortic Valve Replacement: What Do They Tell Us?
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Abstract
Introduction Lactate dehydrogenase (LDH) is a standard postoperative marker for hemolysis in the presence of paravalvular leakage (PVL) after replacement of the aortic valve (AVR). LDH is elevated in certain valves by a fluttering phenomenon. Previous studies suggested a correlation between microparticles (MPs) and LDH elevation after AVR. Thus, we analyze the postoperative relevance of LDH after AVR with transapical transcatheter aortic valves (TA-TAVs) or rapid deployment valves (RDVs).
Methods We retrospectively analyzed the data from patients who received an AVR with the RDV and TA-TAV groups between 2015 and 2018. We compared PVL and LDH levels before and after surgery, transvalvular gradients, heart block that required pacemaker implantation, and 30-day mortality.
Results In total, 138 consecutive patients were selected for the study: 79 patients in the RDV group (37 Sorin Perceval valve, 42 Edwards Intuity valve) and 59 in the TA-TAV group (Edwards Sapien valve). TA-TAV group was older (median 10 years) and had a higher incidence of PVL (odds ratio 11, 95% confidence interval [CI] 2.5–73.2, p = 0.04)). Interestingly, the TA-TAV group showed lower levels of LDH despite higher rates of PVL. Of note, the Perceval valve trended toward higher LDH values. Additionally, the RDV group showed an increased arrhythmia profile (p = 0.0041); however, the results show lower incidence in pacemaker implantation (95% CI 0.05–1.65, p = 0.635). The 30-day mortality was similar between groups.
Conclusion Our data do not support the association between hemolysis and PVL despite elevated LDH in suture-free valves. Our results suggest that LDH could be a marker of extreme heart muscle output or fluttering phenomenon and not a marker of hemolysis after sutureless AVR.
Keywords
aortic valve and root - heart valve surgery - heart valve - transapical - percutaneous (TAVI) - cardiacAuthors' Contribution
O.D. and H.R.C.B. contributed equally as the last authors of this manuscript due to their unparalleled expertise and collaborative efforts. Together, their combined expertise advanced the research and set a high standard for interdisciplinary collaboration in scientific studies.
* These authors contributed equally.
Publication History
Received: 12 August 2024
Accepted: 22 October 2024
Accepted Manuscript online:
01 November 2024
Article published online:
26 November 2024
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