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Are elevated serum haemolysis markers a harbinger of adverse events in HeartMate II patients?

Abstract：

OBJECTIVES:Haemolysis during left ventricular assist device support is associated with thrombosis. In this retrospective study, we analysed whether low-level haemolysis (LLH) as defined by simultaneously elevated lactate dehydrogenase (LDH) and free haemoglobin (fHb) levels had an impact on thromboembolic and bleeding events and on von Willebrand factor levels in HeartMate II patients. METHODS:After exclusion of patients with LDH >700 U/l and fHb >40 mg/dl at hospital discharge, 79 HeartMate II patients were included. LDH and fHb levels were measured at discharge and in 3 months interval. von Willebrand factor activity and antigen activity were measured 3 months postoperatively. Outcomes regarding ischaemic stroke (IS), pump thrombosis (PT) and gastrointestinal bleeding were recorded. Patients with LLH (400 < LDH ≤ 700 U/l and 30 < fHb ≤ 40 mg/dl) at discharge (pre-Hemolyzers) were compared with the rest of the cohort (non-Hemolyzers). Competing risk analysis and Cox regression were applied for the comparison between groups. RESULTS:In all, 20% of the patients were identified as pre-Hemolyzers. Of these, 5 patients had PT and 3 patients had IS compared with 2 PT and 2 IS in the non-Hemolyzers group (P = 0.003 and P = 0.053, respectively). Fifty percent of the pre-Hemolyzers suffered gastrointestinal bleeding compared with 42% of the non-Hemolyzers (P = 0.399). The cumulative risk of thromboembolic events (IS or PT) in the pre-Hemolyzers group was significantly higher compared with the non-Hemolyzers group (hazard ratio 11.8, 95% confidence interval 3.7-37.7; P = 0.005). LLH did not have an impact on von Willebrand factor and the incidence of gastrointestinal bleeding. CONCLUSIONS:LLH as assessed by elevated fHb and LDH values at discharge during HeartMate II support is associated with thromboembolic events.

journal_name

Interact Cardiovasc Thorac Surg

journal_title

Interactive cardiovascular and thoracic surgery

authors

Zayat R,Shoaib M,Khattab MA,Ahmad U,Goetzenich A,Stoppe C,Foldenauer AC,Moza A,Schnoering H,Autschbach R,Tewarie L

doi

10.1093/icvts/ivy027

subject

Has Abstract

pub_date

2018-07-01 00:00:00

pages

5-12

issue

eissn

1569-9293

issn

1569-9285

pii

4850987

journal_volume

pub_type

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Are elevated serum haemolysis markers a harbinger of adverse events in HeartMate II patients?