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Bleeding complications after cardiac surgery, before anticoagulation start and then with argatroban or heparin in the early postoperative setting

Journal of Cardiothoracic Surgery volume 15, Article number: 27 (2020) Cite this article

Abstract

Objectives

After elective cardiac surgery a postoperative anticoagulation is obligatory. With critically ill patients the conventional anticoagulation standard heparin is sometimes impossible, e.g. based on HIT II. Then, argatroban is currently a possible alternative, however, due to its impaired metabolism in critically ill patients, anticoagulation effect is harder to anticipate, thus resulting in higher bleeding risk. Furthermore, to date no antidote is available. Hence, severe postoperative bleeding incidents under anticoagulation are commonly mono-causal attributed to the anticoagulation itself. This study concentrates on the number of well-defined postoperative bleeding incidents before any anticoagulation started, then actually under argatroban as well as compared to those under heparin (or switched from heparin to argatroban).

Material and methods

Retrospective study including 215 patients undergoing elective cardiac surgery with a postoperative stay in ICU ≥48 h. Postoperative bleeding complications before and after start of anticoagulation were evaluated. Definition of bleeding complications were: decrease of hemoglobin by more than 2 g/dl without dilution (mean value of volume balance plus one standard deviation) and/or increased need of red blood cell transfusion/day (average transfusion rate + 2 standard deviations).

Results

Within the study group of 215 patients, 143 were treated with heparin, 43 with argatroban, 29 switched from heparin to argatroban. Overall, 26.5% (57/215) postoperative bleeding complications occurred. In 54.4% (31/57) bleeding complications occurred before start of anticoagulation; in 43.6% (26/57) after. Of these, 14 bleeding incidents occurred under heparin 9.8% (14/143), 6 under argatroban 14% (6/43) and 6 switched 20.7% (6/29). Higher bleeding complications before start of anticoagulation was related to concomitant factors influencing the overall bleeding risk; e.g. score of severity of illness. These observations further correlate with postoperative, but not anticoagulation induced mortality rate of 2.8% of then given heparin, 20.9% then argatroban, 20.7% then switched.

Conclusions

Postoperative bleeding complications cannot simply be attributed to anticoagulation since occurring often before anticoagulation was started. The risk for bleeding complications after start of anticoagulation was quite comparable for argatroban and heparin. Accordingly, the influence of argatroban on bleeding complications in the postoperative period may be less significant than previously thought.

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Introduction

Anticoagulation in postoperative settings is essential due to the risk of deep venous thrombosis which is higher after vascular or cardiac operations than other procedures [1]. The general probability of patients in intensive care units developing a deep vein thrombosis is estimated at 10–30% [2, 3]. Although thrombosis is rarely diagnosed after cardiac surgery (< 1%), the frequency of clinically not symptomatic thrombosis is around 20% (10–48%) despite compression therapy or aspirin in the absence of anticoagulation [4,5,6]. Pulmonary embolism has been described in older studies in 1–9.5% after bypass operations [4, 7]. More recent studies suggest that a higher incidence may be expected in clinically inconspicuous patients without anticoagulation (10.1–25%) [8,9,10]. Symptoms of embolism such as dyspnoea, thoracic pain, tachycardia, swelling of the legs, low oxygen saturation, or fever are usually associated with comorbidities or surgical trauma [10,11,12]. According to the German guideline (S3-AWMF), anticoagulation with unfractionated or low molecular weight heparin is recommended, resulting in significantly reduced incidences of thromboembolic events [13].

After cardiac surgery, approximately 1–5% of the patients develop heparin induced thrombocytopenia, HIT II, under heparin therapy [14,15,16]. In such cases, argatroban is a possible alternative for anticoagulation: argatroban is a synthetic direct thrombin inhibitor derived from L-arginine [17]. Argatroban is metabolised in the liver and excreted via the biliary system; a dose adjustment must be considered in case of hepatic dysfunction and in critically ill patients [18, 19]. The half-life of argatroban is about 45 min in healthy persons [20]. There is currently no antidote for argatroban available. Thus, concerns over an increased risk of bleeding complications under argatroban as such, as well as compared to heparin in a postoperative setting are frequently present.

Within the present study, we evaluated the actual bleeding complications under argatroban and heparin for postoperative anticoagulation during the early postoperative period after elective cardiac surgery. To put this in context, we parallel analysed factors contributing to postoperative bleeding complications as such even before start of anticoagulation.

Subjects and methods

This was a retrospective review of a previously collected prospectively study cohort:

Study cohort (previously collected)

From January 2010 to March 2011 all patients scheduled for elective cardiac surgery within the department of thoracic and cardiovascular surgery at the Saarland University Medical Centre were screened for inclusion. Exclusion criteria were: age < 18 years, refusal to participate, emergency admissions for cardiac surgery, haemodynamic instability necessitating emergency cardiac surgery, or inability to give written consent for participation. The study was designed as a prospective cohort study and approved by the local ethics committee (Landesärztekammer des Saarlandes; Ref. ID: 199/09). Written informed consent was obtained from all patients being included in this study. Finally, 865 patients were included [21, 22].

Clinical data were obtained during an initial standardised patient interview and subsequent review of medical documentation. Patient demographic and perioperative data were entered into a data bank.

Actual study-group for evaluation of postoperative surgical anticoagulation

In a retrospective study design data of postoperative anticoagulation was evaluated. Based on the initial study cohort of 865 patients described above, only those with a postoperative stay in Intensive Care Unit, ICU, ≥48 h were included. Further exclusion criteria were: known endogenous factors that promote bleeding complication (e.g. von Willebrand-Jürgens syndrome); and, one patient with ruptured abdominal aortic aneurysm was excluded. Finally 215 patients were included who all received either purely heparin or argatroban or were switched from heparin to argatroban for anticoagulation in the postoperative period.

Laboratory parameters and bleeding complications

Blood samples for biochemical monitoring were processed by the central laboratory of the Saarland University Medical Centre. Further, preoperatively liver function was assessed through the medical history screening for documented liver injury (hepatitis, alcohol, cirrhosis cardiaque, pulmonary hypertension, others). Both the Child-Pugh stage as well as the MELD score (Model for End-stage Liver Disease) on admission were calculated. A preoperative liver damage was assumed if the total bilirubin concentration was above the laboratory-specific norm combined with increased levels of GPT (Glutamat-Pyruvat-Transaminase), GOT (Glutamat-Oxalacetat-Transaminase) or GGT (Gamma-Glutamyl-Transferase), or a decreased albumin or AT III (Antithrombine) concentration. Postoperative liver cell damage was defined as an increase in GPT and/or GGT 10 times higher than the laboratory-specific norms during intensive care unit stay. In addition, every postoperative increase of the total bilirubin concentration, the maximal total bilirubin concentration and the maximal MELD score during stay in ICU were documented.

Bleeding complications were in detail defined as:

  1. 1)

    documented bleeding complications including increased chest tubes output and reopening for pericardial tamponade or bleeding.

  2. 2)

    decrease of hemoglobin by more than 2 g/dl without dilution (dilution was assumed in case of volume excess, defined as positive volume balance > than the mean value of all patients plus one standard deviation).

  3. 3)

    increased need for red blood cell transfusion: a transfusion occurred routinely in patients when the hemoglobin-value was below the target hemoglobin of 10 g/dl; the need was increased if the demand for erythrocyte concentrates to maintain this target hemoglobin-value exceeded two or more standard deviations of the average number of required erythrocyte concentrates by all patients.

Anticoagulation and its monitoring

The 215 study group patients were divided into three groups according to the postoperatively given anticoagulation:

  • group heparin: exclusively heparin

  • group argatroban: exclusively argatroban

  • group switched: switch from heparin to argatroban

The anticoagulation type and/or the switch was mostly related to the suspicion of HIT. However, the preference of the attending physician in ICU and/or surgeon also may have played a role.

Generally, various parameters were documented to assess coagulation:

  1. 1)

    the maximum aPTT within the first 24 h after initiation of argatroban or heparin (the target aPTT was 60-90s).

  2. 2)

    use of oral anticoagulants (mainly Vit-K-antagonists) or platelet aggregation inhibitors (ASS, Plavix, alone or combined) simultaneously to anticoagulation with argatroban or heparin.

  3. 3)

    the total number of transfused platelet concentrates (PC) and the average need of transfused PC per observation day during the intensive care stay.

  4. 4)

    a drop in the platelet count below 100 * 109 / l.

Statistical analysis

Continuous variables are expressed as mean ± SD (normally distributed variables) or as median and the range minimum to maximum (skewed variables). Categorical variables are presented as a percentage, unless otherwise stated. For comparisons between continuous variables the unpaired t-test was used. Categorical variables were compared by use of Chi-square test or Fisher exact test, respectively. The risk of argatroban for bleeding complications compared with heparin was initially estimated via univariate analysis. Thereafter, risk was estimated in a primary model using multivariable logistic regression including preoperative hemoglobin, pTTmax, thrombocytopenia, severity of illness (SAPS II) and surgical aspects like operation time as confounding factors. Two sensitivity analyzes were performed, such as including the confounding factors for hepatic dysfunction (Quick-value, liver cell damage, MELD max, Bilirubin max). Two-sided p-values < 0.05 were considered statistically significant. Data analysis was performed using IBM SPSS Statistics 23.0™ (IBM Corp., Armonk, N.Y., USA).

Results

Participants and descriptive data

At all, 215 patients out of the previously collected prospectively studied cohort (n = 865) met inclusion criteria for the retrospective evaluation of postoperative bleeding complications before start of and under anticoagulation with heparin, argatroban and switched from heparin to argatroban.

The study population was divided into three groups according to the anticoagulation: 143 patients received exclusively heparin, 43 argatroban and 29 were switched from heparin to argatroban. Baseline characteristics of study population are presented in Table 1.

Table 1 Baseline preoperative characteristics and comorbidities
Full size table

Postoperatively, there were only minor differences between the three groups regarding basic parameters. But: Patients in the argatroban and switched groups were more likely to be critically ill compared to patients receiving (only) heparin. e.g. with respect to SAPS II.

Bleeding complications and point in time of bleeding complications

Postoperative bleeding complications occurred in 31 (14.4%) before, 26 (12.1%) after start of anticoagulation, in total 57 (26.5%) out of 215 patients; shown in Table 2 and Fig. 1. However, incidences in patients later directly receiving or switched to argatroban were before anticoagulation start significantly, after start only minor higher compared to the exclusively heparin group.

Table 2 Occurrence of postoperative bleeding complications overall split into before and after start of anticoagulation, and summing up
Full size table
Fig. 1
figure 1

Relative occurrence of bleeding complications before and after initiation of anticoagulation per group and overall

Full size image

Mean period between end of surgery and start of anticoagulation was in the heparin group 6.5 h, in the argatroban 14.4 h, in the switched group 6.7 h with heparin and switched 44.4 h thereafter to argatroban. Postoperative bleeding complications before start of anticoagulation occurred within the heparin (143/215) in 7.7% (11/143), within the argatroban (43/215) 32.5% (14/43) and within the switched group (29/215) in 20.7% (6/29). Bleeding complications after start of anticoagulation occurred in 9.8% (14/143) within the heparin, in 14.0% (6/43) within the argatroban and in 20.7% (6/29) within the switched group.

An internal analysis of each group separately before and after start of anticoagulation shows indeed a relation of bleeding complications within the heparin group of 44% (11/25) before and 56% (14/25) after, within the argatroban group 70% (14/20) and 30% (6/20) after, within the switched 50% (6/12) before and 50% (6/12) after. Unfortunately, the total and each group respective number of patients with bleeding complication after initiation of anticoagulation was too small for further statistical evaluation.

Anticoagulation and outcome

There was a clear difference in postoperative disease severity between patients who received exclusively heparin and all those who received argatroban including patients who were switched as shown in Table 3.

Table 3 Anticoagulation and postoperative outcome
Full size table

Mortality in all patients was 8.8% (19/215). Mortally rate differed significantly in patients receiving heparin 2.8% (4/143) {total: 1.8% 4/215}, compared to patients receiving argatroban 20.9% (9/43) {total: 4.2% 9/215} or those switched to argatroban 20.7% (6/29) {total: 2.8% 6/215}. But: No patient died of postoperative bleeding complications.

Parameters with impact on bleeding tendency (Table 4)

Preoperative mean platelet counts, prothrombin time, PTT-values and parameters of liver function were comparable and within normal range in all three groups. In contrast, hemoglobin was preoperatively significantly lower in the solely argatroban group compared to the heparin and switched groups. As well, signs of postoperative liver cell damage were significantly more frequent within the argatroban than the solely heparin group.

Table 4 Monitored parameters of anticoagulation
Full size table

Anticoagulation and its monitoring (Table 4)

Postoperatively monitored coagulation parameters showed significantly longer PTT as well as significantly higher maximum measured PTT within the first 24 h of anticoagulation in the argatroban and the switched than in the heparin group.

Thrombocytes

During the entire observation period, platelet counts fell to < 100*109/l in 29.4% within the heparin, in 79.1% within the argatroban (p < 0.001), and in 69.0% within the switched group (p < 0.001). This reflects retrospectively the suspicion of HIT and the choice of argatroban. Postoperative platelet transfusions (after exclusion of HIT II) were more frequently within the argatroban or switched than the heparin group (60.5 and 44.8% vs. 19.6% per group; p < 0.001 and p = 0.007).

Factors showing impact on bleeding complication

To evaluate the influence of anticoagulation (heparin and argatroban) on bleeding complications and other factors affecting coagulation, e.g. platelet count, a multivariate regression analysis was performed. Individual factors potentially influencing bleeding complication were gradually incorporated into the model. In the univariate analysis, the risk of postoperative bleeding complication as such within the argatroban-treated group is statistically higher than within the heparin-treated one (OR:4.1 p < 0.001). After adjustment to these former and in Table 5 described confounders the increased risk of bleeding complications before and under argatroban compared to heparin seems largely to be based on these factors (OR = 2.2, p = ns (0.06)). This result is also confirmed by the sensitivity analysis, with additional preoperative and postoperative factors as shown in Table 5. Of note, the influence of concomitant factors compared to all patients receiving heparin has deliberately been analysed for the argatroban group as such, independently from the point of time of start of anticoagulation.

Table 5 Logistic regression analysis argatroban vs. heparin (n = 186)
Full size table

Discussion

Anticoagulation after actually started medication may have an impact on certain early postoperative bleeding complications in patients undergoing cardiac surgery. To the best of our knowledge, this is the first study comparing the bleeding risk of patient groups before and after start of heparin, argatroban or switched from heparin to argatroban in this vulnerable period.

In a first and rough approach, bleeding complications overall occurred more often before anticoagulation start, then indeed in a total number of the study group slightly more often in patients receiving argatroban compared to heparin, but less with switched. Nevertheless, the suspected higher bleeding risk of argatroban in the postoperative setting per se compared to heparin, since anticoagulation with argatroban is more difficult to control and to monitor for critically ill patients [19, 23], cannot be clearly confirmed.

Rather, our study reveals several aspects more likely to attribute the tendency for bleeding complications to the severity code of critical ill patients.

In this retrospective analysis, firstly, patients finally receiving argatroban were pre- and postoperatively more critically ill, had lower platelet counts and showed more disturbed coagulation parameters compared to those receiving heparin, and a significantly higher postoperative bleeding complication rate before start of anticoagulation. Thus, there is a selection bias between these groups explained by the retrospective setting and clinical decision criteria for one or another anticoagulation. This explains why in logistic regression analysis the crude bleeding risk of the argatroban group compared to the heparin one was 4.2 times higher. However, after adjusting for confounders, including start of anticoagulation, this risk was reduced formally to 2.2 times higher and was thereby no longer statistically significant.

Secondly, apart from factors impacting bleeding risk, most important was to evaluate the postoperative point in time of bleeding complication, and the point in time actually starting anticoagulation. Commonly, group affiliation is exclusively defined on the basis of anticoagulation type without the actual application status (before/ after started) in case of bleeding complication(s). But, as in clinical routine anticoagulation is not directly started after surgery, and as the time span between end of surgery and start of anticoagulation differs between patients, bleeding complications before start of anticoagulation cannot be related to any anticoagulation at all. In our study group slightly more than half of all bleeding complications occurred prior to start of anticoagulation. This extremely important aspect is only taken into account when bleeding complication group affiliation is solely based on actually started heparin and/ or argatroban treatment. Based on such sophisticated evaluation criteria, the rates of bleeding complications were comparable between the 3 groups with 9.8% heparin, 14% argatroban, and 20.7% switched under anticoagulation.

Currently, only few and inhomogeneous data of argatroban after cardiac surgery are available, confirming such rates of bleeding complication with rates of 6.3 and 12.5% with heparin and argatroban, respectively [24] and 12% with argatroban [25]. Other publications with mixed patient populations in ICUs report bleeding rates of 22% to almost 50% - with significantly more bleeding after surgical procedures than in medical patients [26, 27]. Added up, the number of included patients in each of those studies is quite low, suitable control groups are missing and often bleeding is only a secondary evaluated issue. And, those studies also had a retrospective design. Further, it shows that reported relationship between anticoagulation with argatroban and bleeding maybe questionable, as bleeding complications were often described before starting or while not applied anticoagulation, without distinguishing the yes/no status of treatment in the analysis. This is well reflected in an argatroban study of Yoon et al. with a reported bleeding rate of 64.5% after CABG surgery, but 40% bleeding incidents occurred before initiation or after argatroban application [28]. Two larger studies (304 and 418 patients) report about bleeding rates under argatroban in patients with HIT between 3% up to 11% [29, 30]; recorded up to 30 days after argatroban initiation, but the mean argatroban therapy duration was only 4–6 days.

In summary, in our study as in other studies patients are assigned to an anticoagulant group per se. But, to overcome the usual association of bleeding incidents with the respective anticoagulant simply by given group name, we deliberately distinguished whether when bleeding incidents showed anticoagulation was yet started or still/ at all applied.

Limitations

Our study group is a negative selection of patients after cardiac surgery, only included if they stayed in ICU more than 48 h after surgery. Due to the retrospective study design, there are several biases as mentioned above, e.g. assigning patients to the different anticoagulants. The evaluated occurrence of bleeding complications during proven anticoagulation period was too small for further analysis.

Conclusions

After cardiac surgery bleeding complications occurred significantly more often already before treatment start in those patients later then receiving argatroban versus those with heparin, or switched from heparin to argatroban. This relativly higher bleeding risk was related to concomitant factors that generally increase bleeding incident risk; e.g. severity score of illness. Additionally, more bleeding complications in total and in each sub-group as such occurred before anticoagulation start.

Evaluating the bleeding complications, our study results do not show evidence for higher bleeding risk under argatroban, however the indication of argatroban for postoperative anticoagulation should be individually and critically evaluated, especially due to the challenge of a missing antidote so far. In prospective studies evaluating postoperative anticoagulation and bleeding risk we propose to include the point in time of bleeding in relation to the start of anticoagulation, thereby the actual bleeding risk of argatroban and heparin can be further assessed.

Availability of data and materials

The datasets during and/or analysed during the current study available from the corresponding author on reasonable request.

Abbreviations

AT III:

Antithrombine III

GGT:

Gamma-Glutamyl-Transferase

GOT:

Glutamat-Oxalacetat-Transaminase

GPT:

Glutamat-Pyruvat-Transaminase

HIT II:

Heparin induced Thrombopenia

ICU:

Intensive Care Unit

MELD:

Model for End-stage Liver Disease

PTT:

Partial Thrombin Time

References

  1. Aziz F, Patel M, Ortenzi G, Reed AB. Incidence of postoperative deep venous thrombosis is higher among cardiac and vascular surgery patients as compared with general surgery patients. Ann Vasc Surg. 2015;29(4):661–9.

    Article  Google Scholar 

  2. Attia J, Ray JG, Cook DJ, Douketis J, Ginsberg JS, Geerts WH. Deep vein thrombosis and its prevention in critically ill adults. Arch Intern Med. 2001;161(10):1268–79.

    Article  CAS  Google Scholar 

  3. Cook D, Crowther M, Meade M, et al. Deep venous thrombosis in medical-surgical critically ill patients: prevalence, incidence, and risk factors. Crit Care Med. 2005;33(7):1565–71.

    Article  Google Scholar 

  4. Goldhaber SZ, Hirsch DR, MacDougall RC, Polak JF, Creager MA, Cohn LH. Prevention of venous thrombosis after coronary artery bypass surgery (a randomized trial comparing two mechanical prophylaxis strategies). Am J Cardiol. 1995;76(14):993–6.

    Article  CAS  Google Scholar 

  5. Reis SE, Polak JF, Hirsch DR, et al. Frequency of deep venous thrombosis in asymptomatic patients with coronary artery bypass grafts. Am Heart J. 1991;122(2):478–82.

    Article  CAS  Google Scholar 

  6. Shammas NW. Pulmonary embolus after coronary artery bypass surgery: a review of the literature. Clin Cardiol. 2000;23(9):637–44.

    Article  CAS  Google Scholar 

  7. Rao G, Zikria EA, Miller WH, Samadani SR, Ford WB. Incidence and prevention of pulmonary embolism after coronary artery surgery. Vasc Surg. 1975;9(1):37–45.

    Article  CAS  Google Scholar 

  8. Lahtinen J, Ahvenjarvi L, Biancari F, et al. Pulmonary embolism after off-pump coronary artery bypass surgery as detected by computed tomography. Am J Surg. 2006;192(3):396–8.

    Article  Google Scholar 

  9. Lee CK, Kim YM, Shim DJ, Na CY, Oh SS. The detection of pulmonary embolisms after a coronary artery bypass graft surgery by the use of 64-slice multidetector CT. Int J Cardiovasc Imaging. 2011;27(5):639–45.

    Article  Google Scholar 

  10. Viana VB, Melo ER, Terra-Filho M, et al. Frequency of deep vein thrombosis and/or pulmonary embolism after coronary artery bypass grafting investigation regardless of clinical suspicion. Am J Cardiol. 2017;119(2):237–42.

    Article  Google Scholar 

  11. Goldhaber SZ, Schoepf UJ. Pulmonary embolism after coronary artery bypass grafting. Circulation. 2004;109(22):2712–5.

    Article  Google Scholar 

  12. Protopapas AD, Baig K, Mukherjee D, Athanasiou T. Pulmonary embolism following coronary artery bypass grafting. J Card Surg. 2011;26(2):181–8.

    Article  Google Scholar 

  13. Alhazzani W, Lim W, Jaeschke RZ, Murad MH, Cade J, Cook DJ. Heparin thromboprophylaxis in medical-surgical critically ill patients: a systematic review and meta-analysis of randomized trials. Crit Care Med. 2013;41(9):2088–98.

    Article  CAS  Google Scholar 

  14. Warkentin TE, Levine MN, Hirsh J, et al. Heparin-induced thrombocytopenia in patients treated with low-molecular-weight heparin or unfractionated heparin. N Engl J Med. 1995;332(20):1330–5.

    Article  CAS  Google Scholar 

  15. Spinler SA. Managing heparin-induced thrombocytopenia: preventing life- and limb-threatening thrombosis. Introduction. Am J Health Syst Pharm. 2003;60(Suppl 5):S2–4.

    Article  Google Scholar 

  16. Lee DH, Warkentin TE. Frequency of heparin-induced thrombocytopenia. Heparin Induced Thrombocytopenia. 2004;47:107–48.

    CAS  Google Scholar 

  17. Di Nisio M, Middeldorp S, Buller HR. Direct thrombin inhibitors. N Engl J Med. 2005;353(10):1028–40.

    Article  Google Scholar 

  18. Klingele M, Bomberg H, Lerner-Graber A, et al. Use of argatroban: experiences in continuous renal replacement therapy in critically ill patients after cardiac surgery. J Thorac Cardiovasc Surg. 2014;147(6):1918–24.

    Article  CAS  Google Scholar 

  19. Link A, Girndt M, Selejan S, Mathes A, Bohm M, Rensing H. Argatroban for anticoagulation in continuous renal replacement therapy. Crit Care Med. 2009;37(1):105–10.

    Article  CAS  Google Scholar 

  20. Swan SK, Hursting MJ. The pharmacokinetics and pharmacodynamics of argatroban: effects of age, gender, and hepatic or renal dysfunction. Pharmacotherapy. 2000;20(3):318–29.

    Article  CAS  Google Scholar 

  21. Klingele M, Bomberg H, Poppleton A, et al. Elevated procalcitonin in patients after cardiac surgery: a hint to nonocclusive mesenteric ischemia. Ann Thorac Surg. 2015;99(4):1306–12.

    Article  Google Scholar 

  22. Speer T, Groesdonk HV, Zapf B, et al. A single preoperative FGF23 measurement is a strong predictor of outcome in patients undergoing elective cardiac surgery: a prospective observational study. Crit Care. 2015;19:190.

    Article  Google Scholar 

  23. Link A, Poss J, Bohm M. Diagnosis and treatment of heparin-induced thrombocytopenia. Dtsch Med Wochenschr. 2011;136(18):953–62 quiz 963-956.

    Article  Google Scholar 

  24. Demma LJ, Paciullo CA, Levy JH. Recognition of heparin-induced thrombocytopenia and initiation of argatroban therapy after cardiothoracic surgery in the intensive care unit. J Thorac Cardiovasc Surg. 2012;143(5):1213–8.

    Article  CAS  Google Scholar 

  25. Hoffman WD, Czyz Y, McCollum DA, Hursting MJ. Reduced argatroban doses after coronary artery bypass graft surgery. Ann Pharmacother. 2008;42(3):309–16.

    Article  CAS  Google Scholar 

  26. Begelman SM, Baghdasarian SB, Singh IM, Militello MA, Hursting MJ, Bartholomew JR. Argatroban anticoagulation in intensive care patients: effects of heart failure and multiple organ system failure. J Intensive Care Med. 2008;23(5):313–20.

    Article  Google Scholar 

  27. Doepker B, Mount KL, Ryder LJ, Gerlach AT, Murphy CV, Philips GS. Bleeding risk factors associated with argatroban therapy in the critically ill. J Thromb Thrombolysis. 2012;34(4):491–8.

    Article  CAS  Google Scholar 

  28. Yoon JH, Yeh RW, Nam KH, Hoffman WD, Agnihotri AK, Jang IK. Safety and efficacy of the argatroban therapy during the early post-cardiac surgery period. J Thromb Thrombolysis. 2010;30(3):276–80.

    Article  CAS  Google Scholar 

  29. Lewis BE, Wallis DE, Berkowitz SD, et al. Argatroban anticoagulant therapy in patients with heparin-induced thrombocytopenia. Circulation. 2001;103(14):1838–43.

    Article  CAS  Google Scholar 

  30. Lewis BE, Wallis DE, Leya F, Hursting MJ, Kelton JG, Argatroban I. Argatroban anticoagulation in patients with heparin-induced thrombocytopenia. Arch Intern Med. 2003;163(15):1849–56.

    Article  CAS  Google Scholar 

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Acknowledgements

This study is part of doctoral theses of J. Enkel.

Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Authors and Affiliations

  1. Department of Internal Medicine, Nephrology and Hypertension, Saarland University Medical Centre, Homburg, Saar, Germany

    Matthias Klingele, Julia Enkel & Timo Speer

  2. Department of Nephrology, Hochtaunuskliniken, Zeppelinstrasse 32, 61352, Bad Homburg, Germany

    Matthias Klingele & Lea Baerens

  3. Department of Thoracic and Cardiovascular Surgery, Saarland University Medical Centre, Homburg, Saar, Germany

    Julia Enkel & Hans-Joachim Schäfers

  4. Department of Anaesthesiology, Intensive Care and Pain Therapy, Saarland University Medical Centre, Homburg, Saar, Germany

    Hagen Bomberg

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  1. Matthias Klingele
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Contributions

HJS and MK designed this study. HJS, MK and HB were responsible for medical care. Data were collected by JE. JE and HB performed statistical analysis. MK, JE, LB and HB analysed clinical data and interpreted the data. MK, LB and JE wrote the manuscript. LB revised critically linguistic details. All authors discussed the results and implications and commented on the manuscript at all stages. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Matthias Klingele.

Ethics declarations

Ethics approval and consent to participate

The study was designed as a prospective cohort study and approved by the local ethics committee (Landesärztekammer des Saarlandes; Ref. ID: 199/09). Written informed consent was obtained from all patients being included in this study.

Consent for publication

Not applicable.

Competing interests

MK received speaker fees from Fresenius, Baxter, Mitsubishi Pharm, Daiichi Sankyo, Cytosorbents. For the remaining authors none were declared.

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Klingele, M., Enkel, J., Speer, T. et al. Bleeding complications after cardiac surgery, before anticoagulation start and then with argatroban or heparin in the early postoperative setting. J Cardiothorac Surg 15, 27 (2020). https://doi.org/10.1186/s13019-020-1059-8

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Keywords

Journal of Cardiothoracic Surgery

ISSN: 1749-8090

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