Abstract
Background
Atrial fibrillation (AF) is a prevalent complication associated with levosimendan; however, it remains uncertain whether there are any disparities in the effects of levosimendan on non-postoperative and postoperative AF.
Objectives
This study aimed to evaluate the levosimendan effect on non-postoperative and postoperative AF by conducting a meta-analysis of randomized control trials (RCTs).
Methods
PubMed, Embase, Cochrane Library, and other databases were searched. Pairs of reviewers identified RCTs that compared levosimendan and placebo or other therapies, and the results reported AF events data. Random effects models were used (at a significance level of 5%).
Results
Twenty-nine eligible trials comprising 6550 participants were included, eleven of which evaluated the non-postoperative AF incidence, and 18 included postoperative AF. The analysis revealed that levosimendan elevated the AF risk significantly in the non-postoperative group (OR, 1.62; 95% CI: 1.19-2.20; p=0.002) and reduced the AF incidence in the postoperative group (OR, 0.65; 95% CI: 0.44-0.96; p=0.03). AF occurrence decreased more significantly in patients who used levosimendan after cardiac surgery (OR, 0.53; 95% CI: 0.32-0.88; p=0.02) than in patients who used levosimendan before cardiac surgery (OR, 0.67; 95% CI: 0.42-1.06; p=0.09). Moreover, The AF risk was significantly elevated by levosimendan large bolus dose (bolus dose≥12 μg/kg) (OR, 1.44; 95% CI: 1.10-1.88; p=0.004) and decreased by small bolus dose of levosimendan (bolus dose<12 μg/kg) (OR, 0.64; 95% CI: 0.34-1.20; p=0.16).
Conclusion
Levosimendan was linked to an increased non-postoperative AF incidence. The employment of levosimendan was effective in preventing postoperative AF.
Keywords
Simendan; Atrial Fibrillation; Network Meta-Analysis
Resumo
Fundamento
A fibrilação atrial (FA) é uma complicação prevalente associada à levosimendana; no entanto, permanece incerto se existem disparidades nos efeitos da levosimendana na FA não pós-operatória e pós-operatória.
Objetivos
Este estudo teve como objetivo avaliar o efeito da levosimendana na FA não pós-operatória e pós-operatória conduzindo uma metanálise de ensaios clínicos randomizados (ECR).
Métodos
PubMed, Embase, Biblioteca Cochrane e outras bases de dados foram pesquisadas. Pares de revisores identificaram ECRs que compararam levosimendana e placebo ou outras terapias, e os resultados relataram dados de eventos de FA. Foram utilizados modelos de efeitos aleatórios (com nível de significância de 5%).
Resultados
Foram incluídos 29 ensaios elegíveis compreendendo 6.550 participantes, onze dos quais avaliaram a incidência de FA não pós-operatória e 18 incluíram FA pós-operatória. A análise revelou que a levosimendana elevou significativamente o risco de FA no grupo não pós-operatório (OR, 1,62; IC 95%: 1,19-2,20; p=0,002) e reduziu a incidência de FA no grupo pós-operatório (OR, 0,65; IC 95%: 0,44-0,96; p=0,03). A ocorrência de FA diminuiu mais significativamente em pacientes que usaram levosimendana após cirurgia cardíaca (OR, 0,53; IC 95%: 0,32-0,88; p=0,02) do que em pacientes que usaram levosimendana antes da cirurgia cardíaca (OR, 0,67; IC 95%: 0,42-1,06; p=0,09). O risco de FA foi significativamente elevado pela grande dose em bolus de levosimendana (dose em bolus ≥12 μg/kg) (OR, 1,44; IC 95%: 1,10-1,88; p=0,004) e diminuído pela pequena dose em bolus de levosimendana (dose em bolus <12 μg/kg) (OR, 0,64; IC 95%: 0,34-1,20; p=0,16).
Conclusão
A levosimendana foi associada a um aumento da incidência de FA não pós-operatória. O emprego da levosimendana foi eficaz na prevenção da FA pós-operatória.
Palavras-chave:
Simendana; Fibrilação Atrial; Metanálise em Rede
Introduction
Levosimendan is a calcium-sensitizer that improves myocardial contractility and produces peripheral vasodilatation. It elevates the cardiac output and has a minimum impact on myocardial oxygen consumption.11. Michaels AD, McKeown B, Kostal M, Vakharia KT, Jordan MV, Gerber IL, et al. Effects of Intravenous Levosimendan on Human Coronary Vasomotor Regulation, Left Ventricular Wall Stress, and Myocardial Oxygen Uptake. Circulation. 2005;111(12):1504-9. doi: 10.1161/01.CIR.0000159252.82444.22.
https://doi.org/10.1161/01.CIR.000015925...
Accordingly, levosimendan can effectively improve hemodynamic abnormalities in heart failure (HF) patients. Levosimendan has been studied in patients with congestive HF and those undergoing cardiac surgery.22. Bergh CH, Andersson B, Dahlström U, Forfang K, Kivikko M, Sarapohja T, et al. Intravenous Levosimendan vs. Dobutamine in Acute Decompensated Heart Failure Patients on Beta-blockers. Eur J Heart Fail. 2010;12(4):404-10. doi: 10.1093/eurjhf/hfq032.
https://doi.org/10.1093/eurjhf/hfq032...
,33. Lahtinen P, Pitkänen O, Pölönen P, Turpeinen A, Kiviniemi V, Uusaro A. Levosimendan Reduces Heart Failure after Cardiac Surgery: A Prospective, Randomized, Placebo-controlled Trial. Crit Care Med. 2011;39(10):2263-70. doi: 10.1097/CCM.0b013e3182227b97.
https://doi.org/10.1097/CCM.0b013e318222...
Levosimendan has various side effects, including low blood pressure, headaches, or atrial fibrillation (AF) despite its positive effect on HF.
AF is prevalent in cardiac failure patients. Various risk factors are shared between AF and HF. Their pathophysiology is interdependent, and when they concurrently occur, the side effects risk increases.44. Hindricks G, Potpara T, Dagres N, Arbelo E, Bax JJ, Blomström-Lundqvist C, et al. 2020 ESC Guidelines for the Diagnosis and Management of Atrial Fibrillation Developed in Collaboration with the European Association for Cardio-Thoracic Surgery (EACTS): The Task Force for the Diagnosis and Management of Atrial Fibrillation of the European Society of Cardiology (ESC) Developed with the Special Contribution of the European Heart Rhythm Association (EHRA) of the ESC. Eur Heart J. 2021;42(5):373-498. doi: 10.1093/eurheartj/ehaa612.
https://doi.org/10.1093/eurheartj/ehaa61...
,55. Fauchier L, Villejoubert O, Clementy N, Bernard A, Pierre B, Angoulvant D, et al. Causes of Death and Influencing Factors in Patients with Atrial Fibrillation. Am J Med. 2016;129(12):1278-87. doi: 10.1016/j.amjmed.2016.06.045.
https://doi.org/10.1016/j.amjmed.2016.06...
Levosimendan reduces oxygen demand and improves myocardial contraction in HF patients, which may indirectly lead to a reduction in AF. Gaballah et al. found that levosimendan showed significant antiarrhythmic properties in their investigation of cardiomyocytes derived from induced pluripotent cells in humans.66. Gaballah M, Penttinen K, Kreutzer J, Mäki AJ, Kallio P, Aalto-Setälä K. Cardiac Ischemia On-a-Chip: Antiarrhythmic Effect of Levosimendan on Ischemic Human-Induced Pluripotent Stem Cell-Derived Cardiomyocytes. Cells. 2022;11(6):1045. doi: 10.3390/cells11061045.
https://doi.org/10.3390/cells11061045...
However, some studies have shown that levosimendan is also associated with a higher incidence rate of AF.77. Packer M, Colucci W, Fisher L, Massie BM, Teerlink JR, Young J, et al. Effect of Levosimendan on the Short-term Clinical Course of Patients with Acutely Decompensated Heart Failure. JACC Heart Fail. 2013;1(2):103-11. doi: 10.1016/j.jchf.2012.12.004.
https://doi.org/10.1016/j.jchf.2012.12.0...
,88. Mebazaa A, Nieminen MS, Packer M, Cohen-Solal A, Kleber FX, Pocock SJ, et al. Levosimendan vs Dobutamine for Patients with Acute Decompensated Heart Failure: The SURVIVE Randomized Trial. JAMA. 2007;297(17):1883-91. doi: 10.1001/jama.297.17.1883.
https://doi.org/10.1001/jama.297.17.1883...
The levosimendan effect on AF data is inconsistent, and to assess this, a meta-analysis comprising over 1100 individuals from 14 randomized controlled trials was conducted. In those studies levosimendan was linked to AF incidence decrease in comparison with controls.99. Harrison RW, Hasselblad V, Mehta RH, Levin R, Harrington RA, Alexander JH. Effect of Levosimendan on Survival and Adverse Events after Cardiac Surgery: A Meta-analysis. J Cardiothorac Vasc Anesth. 2013;27(6):1224-32. doi: 10.1053/j.jvca.2013.03.027.
https://doi.org/10.1053/j.jvca.2013.03.0...
Xing Z et al. conducted in 2018 a meta-analysis comprising 15 randomized controlled trials to assess the levosimendan effect in left ventricular dysfunction patients having cardiac surgery and found that it did not decrease the AF incidence.1010. Xing Z, Tang L, Chen P, Huang J, Peng X, Hu X. Levosimendan in Patients with Left Ventricular Dysfunction Undergoing Cardiac Surgery: A Meta-analysis and Trial Sequential Analysis of Randomized Trials. Sci Rep. 2018;8(1):7775. doi: 10.1038/s41598-018-26206-w.
https://doi.org/10.1038/s41598-018-26206...
Conversely, Jaguszewski et al. found that levosimendan significantly increases the risk of AF.1111. Jaguszewski MJ, Gasecka A, Targonski R, Filipiak KJ, Szarpak L. Efficacy and Safety of Levosimendan and Dobutamine in Heart Failure: A Systematic Review and Meta-analysis. Cardiol J. 2021;28(3):492-93. doi: 10.5603/CJ.a2021.0037.
https://doi.org/10.5603/CJ.a2021.0037...
These contradictory clinical trials outcome underlines the necessity to do more research to evaluate the levosimendan effect on AF risk. More importantly, the levosimendan effect in postoperative and non-postoperative AF, the left ventricular ejection fraction (LVEF) influence, the levosimendan dose, and the follow-up duration on the AF risk data are unclear. Thus, we conducted this meta-analysis, pooling data from all available randomized controlled trials (RCTs), which included levosimendan and reported AF as an adverse event, to further explore these questions in detail.
Methods
Inclusion Criteria
RCTs that compared levosimendan and placebo or other therapies and provided data on the AF occurrence during follow-up were included.
Search methods
PubMed, Embase, Cochrane Library until 1st September 2023, and other databases were used for research. Additionally, the included trials and relevant review reference lists were manually searched to find more potential eligible articles.
Data extraction and quality assessment
In all the trials included, AF was not a pre-specified objective. The AF events number was estimated following the adverse event data. Two authors separately reviewed all research paper titles and abstracts to eliminate irrelevant studies. Disagreements on the extracted data were settled by discussion. Tools from the Cochrane Collaboration were utilized to evaluate the RCTs’ bias risk, which included: allocation concealment, random sequence generation, incomplete outcome data, selective reporting, blinding, and other biases.
Endpoints
We primarily compared non-postoperative and postoperative AF incidence between levosimendan and control groups. The following secondary data were evaluated: time of levosimendan infusion and levosimendan dose.
Statistical analysis
Dichotomous data were calculated by 95% confidence interval (CI) and odds ratios (ORs). We used a random-effect model. Funnel plots were employed to assess publication bias. STATA 15.1 software and Review Manage version 5.4 was used for the statistical analyses. P<0.05 was considered statistically significant.
Results
Eligible studies and subject characteristics
We identified 186 studies, 120 of which were excluded after screening the titles and abstracts. Figure 1 displays the selection flow chart. Twenty-nine studies reported data on AF events, covering 6550 participants.22. Bergh CH, Andersson B, Dahlström U, Forfang K, Kivikko M, Sarapohja T, et al. Intravenous Levosimendan vs. Dobutamine in Acute Decompensated Heart Failure Patients on Beta-blockers. Eur J Heart Fail. 2010;12(4):404-10. doi: 10.1093/eurjhf/hfq032.
https://doi.org/10.1093/eurjhf/hfq032...
,33. Lahtinen P, Pitkänen O, Pölönen P, Turpeinen A, Kiviniemi V, Uusaro A. Levosimendan Reduces Heart Failure after Cardiac Surgery: A Prospective, Randomized, Placebo-controlled Trial. Crit Care Med. 2011;39(10):2263-70. doi: 10.1097/CCM.0b013e3182227b97.
https://doi.org/10.1097/CCM.0b013e318222...
,77. Packer M, Colucci W, Fisher L, Massie BM, Teerlink JR, Young J, et al. Effect of Levosimendan on the Short-term Clinical Course of Patients with Acutely Decompensated Heart Failure. JACC Heart Fail. 2013;1(2):103-11. doi: 10.1016/j.jchf.2012.12.004.
https://doi.org/10.1016/j.jchf.2012.12.0...
,88. Mebazaa A, Nieminen MS, Packer M, Cohen-Solal A, Kleber FX, Pocock SJ, et al. Levosimendan vs Dobutamine for Patients with Acute Decompensated Heart Failure: The SURVIVE Randomized Trial. JAMA. 2007;297(17):1883-91. doi: 10.1001/jama.297.17.1883.
https://doi.org/10.1001/jama.297.17.1883...
,1212. Al-Shawaf E, Ayed A, Vislocky I, Radomir B, Dehrab N, Tarazi R. Levosimendan or Milrinone in the Type 2 Diabetic Patient with Low Ejection Fraction Undergoing Elective Coronary Artery Surgery. J Cardiothorac Vasc Anesth. 2006;20(3):353-7. doi: 10.1053/j.jvca.2006.02.012.
https://doi.org/10.1053/j.jvca.2006.02.0...
13. Altenberger J, Parissis JT, Costard-Jaeckle A, Winter A, Ebner C, Karavidas A, et al. Efficacy and Safety of the Pulsed Infusions of Levosimendan in Outpatients with Advanced Heart Failure (LevoRep) Study: A Multicentre Randomized Trial. Eur J Heart Fail. 2014;16(8):898-906. doi: 10.1002/ejhf.118.
https://doi.org/10.1002/ejhf.118...
14. Anastasiadis K, Antonitsis P, Vranis K, Kleontas A, Asteriou C, Grosomanidis V, et al. Effectiveness of Prophylactic Levosimendan in Patients with Impaired Left Ventricular Function Undergoing Coronary Artery Bypass Grafting: A Randomized Pilot Study. Interact Cardiovasc Thorac Surg. 2016;23(5):740-7. doi: 10.1093/icvts/ivw213.
https://doi.org/10.1093/icvts/ivw213...
15. Baysal A, Yanartas M, Dogukan M, Gundogus N, Kocak T, Koksal C. Levosimendan Improves Renal Outcome in Cardiac Surgery: A Randomized Trial. J Cardiothorac Vasc Anesth. 2014;28(3):586-94. doi: 10.1053/j.jvca.2013.09.004.
https://doi.org/10.1053/j.jvca.2013.09.0...
16. Cholley B, Caruba T, Grosjean S, Amour J, Ouattara A, Villacorta J, et al. Effect of Levosimendan on Low Cardiac Output Syndrome in Patients with Low Ejection Fraction Undergoing Coronary Artery Bypass Grafting with Cardiopulmonary Bypass: The LICORN Randomized Clinical Trial. JAMA. 2017 318(6):548-56. doi: 10.1001/jama.2017.9973.
https://doi.org/10.1001/jama.2017.9973...
17. De Hert SG, Lorsomradee S, Cromheecke S, van der Linden PJ. The Effects of Levosimendan in Cardiac Surgery Patients with Poor Left Ventricular Function. Anesth Analg. 2007;104(4):766-73. doi: 10.1213/01.ane.0000256863.92050.d3.
https://doi.org/10.1213/01.ane.000025686...
18. Desai PM, Sarkar MS, Umbarkar SR. Prophylactic Preoperative Levosimendan for Off-pump Coronary Artery Bypass Grafting in Patients with Left Ventricular Dysfunction: Single-centered Randomized Prospective Study. Ann Card Anaesth. 2018;21(2):123-8. doi: 10.4103/aca.ACA_178_17.
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19. Abacilar AF, Dogan OF. Levosimendan Use Decreases Atrial Fibrillation in Patients after Coronary Artery Bypass Grafting: A Pilot Study. Heart Surg Forum. 2013;16(5):287-94. doi: 10.1532/hsf98.2013190.
https://doi.org/10.1532/hsf98.2013190...
20. Follath F, Cleland JG, Just H, Papp JG, Scholz H, Peuhkurinen K, et al. Efficacy and Safety of Intravenous Levosimendan Compared with Dobutamine in Severe Low-output Heart Failure (The LIDO Study): A Randomised Double-blind Trial. Lancet. 2002;360(9328):196-202. doi: 10.1016/s0140-6736(02)09455-2.
https://doi.org/10.1016/s0140-6736(02)09...
21. Fuhrmann JT, Schmeisser A, Schulze MR, Wunderlich C, Schoen SP, Rauwolf T, et al. Levosimendan is Superior to Enoximone in Refractory Cardiogenic Shock Complicating Acute Myocardial Infarction. Crit Care Med. 2008;36(8):2257-66. doi: 10.1097/CCM.0b013e3181809846.
https://doi.org/10.1097/CCM.0b013e318180...
22. Husebye T, Eritsland J, Müller C, Sandvik L, Arnesen H, Seljeflot I, et al. Levosimendan in Acute Heart Failure Following Primary Percutaneous Coronary Intervention-treated Acute ST-elevation Myocardial Infarction. Results from the LEAF Trial: A Randomized, Placebo-controlled Study. Eur J Heart Fail. 2013;15(5):565-72. doi: 10.1093/eurjhf/hfs215.
https://doi.org/10.1093/eurjhf/hfs215...
23. Juhl-Olsen P, Jakobsen CJ, Rasmussen LA, Bhavsar R, Klaaborg KE, Frederiksen CA, et al. Effects of Levosimendan in Patients with Left Ventricular Hypertrophy Undergoing Aortic Valve Replacement. Acta Anaesthesiol Scand. 2015;59(1):65-77. doi: 10.1111/aas.12425.
https://doi.org/10.1111/aas.12425...
24. Kandasamy A, Simon HA, Murthy P, Annadurai M, Ali MM, Ramanathan G. Comparison of Levosimendan versus Dobutamine in Patients with Moderate to Severe Left Ventricular Dysfunction Undergoing Off-pump Coronary Artery Bypass Grafting: A Randomized Prospective Study. Ann Card Anaesth. 2017;20(2):200-6. doi: 10.4103/aca.ACA_195_16.
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25. Lilleberg J, Laine M, Palkama T, Kivikko M, Pohjanjousi P, Kupari M. Duration of the Haemodynamic Action of a 24-h Infusion of Levosimendan in Patients with Congestive Heart Failure. Eur J Heart Fail. 2007;9(1):75-82. doi: 10.1016/j.ejheart.2006.04.012.
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26. Mehta RH, Leimberger JD, van Diepen S, Meza J, Wang A, Jankowich R, et al. Levosimendan in Patients with Left Ventricular Dysfunction Undergoing Cardiac Surgery. N Engl J Med. 2017;376(21):2032-42. doi: 10.1056/NEJMoa1616218.
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27. Moiseyev VS, Põder P, Andrejevs N, Ruda MY, Golikov AP, Lazebnik LB, et al. Safety and Efficacy of a Novel Calcium Sensitizer, Levosimendan, in Patients with Left Ventricular Failure Due to an Acute Myocardial Infarction. A Randomized, Placebo-controlled, Double-blind Study (RUSSLAN). Eur Heart J. 2002;23(18):1422-32. doi: 10.1053/euhj.2001.3158.
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28. Nieminen MS, Cleland JG, Eha J, Belenkov Y, Kivikko M, Põder P, et al. Oral Levosimendan in Patients with Severe Chronic Heart Failure --The PERSIST Study. Eur J Heart Fail. 2008;10(12):1246-54. doi: 10.1016/j.ejheart.2008.09.006.
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29. Shah B, Sharma P, Brahmbhatt A, Shah R, Rathod B, Shastri N, et al. Study of Levosimendan During Off-pump Coronary Artery Bypass Grafting in Patients with LV Dysfunction: A Double-blind Randomized Study. Indian J Pharmacol. 2014;46(1):29-34. doi: 10.4103/0253-7613.125161.
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30. Sharma P, Malhotra A, Gandhi S, Garg P, Bishnoi A, Gandhi H. Preoperative Levosimendan in Ischemic Mitral Valve Repair. Asian Cardiovasc Thorac Ann. 2014;22(5):539-45. doi: 10.1177/0218492313499352.
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31. Tritapepe L, De Santis V, Vitale D, Santulli M, Morelli A, Nofroni I, et al. Preconditioning Effects of Levosimendan in Coronary Artery Bypass Grafting--a Pilot Study. Br J Anaesth. 2006;96(6):694-700. doi: 10.1093/bja/ael082.
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32. Tritapepe L, De Santis V, Vitale D, Guarracino F, Pellegrini F, Pietropaoli P, et al. Levosimendan Pre-treatment Improves Outcomes in Patients Undergoing Coronary Artery Bypass Graft Surgery. Br J Anaesth. 2009;102(2):198-204. doi: 10.1093/bja/aen367.
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33. Pölzl G, Altenberger J, Comín-Colet J, Delgado JF, Fedele F, García-González MJ, et al. Repetitive Levosimendan Infusions for Patients with Advanced Chronic Heart Failure in the Vulnerable Post-discharge Period: The Multinational Randomized LeoDOR Trial. Eur J Heart Fail. 2023;25(11):2007-17. doi: 10.1002/ejhf.3006.
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-3434. Levijoki J, Pollesello P, Kaivola J, Tilgmann C, Sorsa T, Annila A, et al. Further Evidence for the Cardiac Troponin C Mediated Calcium Sensitization by Levosimendan: Structure-response and Binding Analysis with Analogs of Levosimendan. J Mol Cell Cardiol. 2000;32(3):479-91. doi: 10.1006/jmcc.1999.1093.
https://doi.org/10.1006/jmcc.1999.1093...
All trials were randomized control designs. The detailed participants’ characteristics are summarized in Table 1. Eleven trials performed multi-center studies, and the others were single-center studies. In terms of control agents, 19 studies used a placebo, five used dobutamine, and five used standard therapy.
Study quality and publication bias
Twenty studies were randomized using methods including computer-generated randomization schedules or random number tables, and the randomization process was documented. In 22 studies, allocation concealment was documented with low bias risk, yet this was questionable in seven others. In 73% of the studies, double-blinding was utilized, providing effective blinding to limit participants’ or investigators’ bias on adverse reaction reports. The bias risk assessment results are presented in Figure 2. Figure 3 illustrates the publication bias risk in the included studies. Egger’s test revealed no publication bias evidence (p=0.251).
Levosimendan and atrial fibrillation incidence
Eleven studies assessed the non-postoperative AF occurrence and stated that levosimendan elevated the non-postoperative AF risk significantly (Central Illustration). Eighteen studies reported that levosimendan reduced postoperative AF incidence significantly (Central Illustration). Moreover, the AF incidence decreased significantly more in patients who used levosimendan after cardiac surgery than those who used levosimendan before cardiac surgery (Table 2). Heterogeneity was mostly due to differences in inclusion criteria, levosimendan dose, LVEF, cardiac surgery, and follow-up duration.
Subgroup analysis
A subgroup analysis was conducted according to the LVEF: LVEF≤40% and LVEF>40%. Levosimendan did not significantly change the incidence of AF in both subgroups (Table 2).
Levosimendan was given as a bolus dose followed by continuous infusion in 14 studies, while only continuous infusion was utilized in 13 studies in this meta-analysis. The bolus dose ranged from 6 to 24 μg/kg, and the continuous infusion dose ranged from 0.1 to 0.4 μg/kg/min. The levosimendan bolus dose effect on the AF risk was evaluated by conducting another subgroup analysis. The participants were classified into two subgroups: a large bolus dose (levosimendan dose≥12 μg/kg) and a small bolus dose (levosimendan dose<12 μg/kg) with 0.1 and 0.2 μg/kg/min as a continuous infusion. The AF incidence was significantly increased by a large bolus dose and decreased by a small bolus dose (Table 2).
Analyzing the follow-up length, levosimendan was significantly linked to a high AF risk in eleven studies with more than seven days of follow-up. In 18 studies with no more than seven days of follow-up, a lower AF incidence in the levosimendan group in comparison with controls (Table 2).
Sensitivity analysis
The pooled results were calculated. None of the studies influenced the pooled results and changed the conclusion of this analysis. The study pooled results were analogous (Figure 4).
Discussion
As far as we know, this meta-analysis contained the largest number of RCTs, which compared levosimendan and placebo or other therapies and provided data on the AF occurrence during follow-up. As per our findings, high non-postoperative AF and low postoperative AF incidences were linked to levosimendan. We further found that patients who used levosimendan after cardiac surgery had a more pronounced decrease in the incidence of AF than those who used levosimendan before cardiac surgery.
Levosimendan is a calcium-sensitizer that augments the myocardial contractility by enhancing the myofilament sensitivity to calcium via binding to cardiac troponin C in a calcium-dependent manner.3434. Levijoki J, Pollesello P, Kaivola J, Tilgmann C, Sorsa T, Annila A, et al. Further Evidence for the Cardiac Troponin C Mediated Calcium Sensitization by Levosimendan: Structure-response and Binding Analysis with Analogs of Levosimendan. J Mol Cell Cardiol. 2000;32(3):479-91. doi: 10.1006/jmcc.1999.1093.
https://doi.org/10.1006/jmcc.1999.1093...
It also opens mitochondrial ATP-sensitive potassium channels in cardiac and vascular tissues and exerts peripheral vasodilatory and anti-ischemic effects.3535. Kersten JR, Montgomery MW, Pagel PS, Warltier DC. Levosimendan, a New Positive Inotropic Drug, Decreases Myocardial Infarct Size via Activation of K(ATP) Channels. Anesth Analg. 2000;90(1):5-11. doi: 10.1097/00000539-200001000-00003.
https://doi.org/10.1097/00000539-2000010...
Common inotropic agents improve myocardial contractility by increasing Ca22. Bergh CH, Andersson B, Dahlström U, Forfang K, Kivikko M, Sarapohja T, et al. Intravenous Levosimendan vs. Dobutamine in Acute Decompensated Heart Failure Patients on Beta-blockers. Eur J Heart Fail. 2010;12(4):404-10. doi: 10.1093/eurjhf/hfq032.
https://doi.org/10.1093/eurjhf/hfq032...
that can bind to cardiac troponin-C by increasing myocardial energy, oxygen demand, and the incidence of arrhythmia. Therefore, it has the potential to cause arrhythmias. Conversely, Levosimendan does not increase myocardial energy demand and oxygen consumption.3636. Lancaster MK, Cook SJ. The Effects of Levosimendan on [Ca2+]i in Guinea-pig Isolated Ventricular Myocytes. Eur J Pharmacol. 1997;339(1):97-100. doi: 10.1016/s0014-2999(97)01362-9.
https://doi.org/10.1016/s0014-2999(97)01...
It does not affect intracellular free calcium, therefore, the potential for arrhythmias is also reduced.
A previous meta-analysis did not find that levosimendan infusion could reduce the AF risk in patients undergoing cardiac surgery.1010. Xing Z, Tang L, Chen P, Huang J, Peng X, Hu X. Levosimendan in Patients with Left Ventricular Dysfunction Undergoing Cardiac Surgery: A Meta-analysis and Trial Sequential Analysis of Randomized Trials. Sci Rep. 2018;8(1):7775. doi: 10.1038/s41598-018-26206-w.
https://doi.org/10.1038/s41598-018-26206...
The large-scale randomized clinical trials (LEVO-CTS, CHEETAH, and LICORN) also did not increase the AF incidence rate in the levosimendan group. Our findings demonstrated that levosimendan significantly decreased the AF risk following cardiac surgery and increased the incidence of non-postoperative AF. Levosimendan decreased aAPD90 and aERP significantly. AF reentry and stability are affected by reducing the action potential duration and refractory period.3737. Schotten U, Verheule S, Kirchhof P, Goette A. Pathophysiological Mechanisms of Atrial Fibrillation: A Translational Appraisal. Physiol Rev. 2011;91(1):265-325. doi: 10.1152/physrev.00031.2009.
https://doi.org/10.1152/physrev.00031.20...
The cardiac surgery characteristics differ from levosimendan in acute HF patients. The factors applicable to heart disease patients are usually different from those applicable to the perioperative period. The suspension of standard perioperative treatment, blood loss, cardiopulmonary bypass (CPB) usage, intravascular and extravascular fluids rapid transfer, and systemic inflammatory response syndrome can influence the levosimendan therapy outcome. The metabolite OR-1896 of levosimendan forms slowly in the cardiac surgery environment compared with patients with HF. Peak levels were reached five to six days following the levosimendan infusion cessation because of the fasting following surgery and the broad-spectrum antibiotics usage in cardiac surgery.3838. Eriksson HI, Jalonen JR, Heikkinen LO, Kivikko M, Laine M, Leino KA, et al. Levosimendan Facilitates Weaning from Cardiopulmonary Bypass in Patients Undergoing Coronary Artery Bypass Grafting with Impaired Left Ventricular Function. Ann Thorac Surg. 2009;87(2):448-54. doi: 10.1016/j.athoracsur.2008.10.029.
https://doi.org/10.1016/j.athoracsur.200...
From the pharmacokinetic characteristics of levosimendan, its usage before or during the perioperative period may have very different effects. The levosimendan inotropic and cardioprotective characteristics can have a long-lasting effect, helping reduce postoperative complications. Experts advised using levosimendan for generally impaired myocardial function patients one day before cardiac surgery.3939. Toller W, Heringlake M, Guarracino F, Algotsson L, Alvarez J, Argyriadou H, et al. Preoperative and Perioperative Use of Levosimendan in Cardiac Surgery: European Expert Opinion. Int J Cardiol. 2015;184:323-36. doi: 10.1016/j.ijcard.2015.02.022.
https://doi.org/10.1016/j.ijcard.2015.02...
However, the subgroup analysis showed that levosimendan usage after cardiac surgery is linked to a considerable decrease in AF incidence. The mechanism of levosimendan inhibiting postoperative AF is unclear, but it may be related to the levosimendan antioxidant and anti-inflammatory characteristics.4040. Kowalczyk M, Banach M, Lip GY, Kozlowski D, Mikhailidis DP, Rysz J. Levosimendan - A Calcium Sensitising Agent with Potential Anti-arrhythmic Properties. Int J Clin Pract. 2010;64(8):1148-54. doi: 10.1111/j.1742-1241.2010.02396.x.
https://doi.org/10.1111/j.1742-1241.2010...
However, there are currently no significantly high-quality trials using levosimendan at this time point, requiring further evaluation.
The AF incidence rate elevates with the HF severity.4141. Maisel WH, Stevenson LW. Atrial Fibrillation in Heart Failure: Epidemiology, Pathophysiology, and Rationale for Therapy. Am J Cardiol. 2003;91(6):2-8. doi: 10.1016/s0002-9149(02)03373-8.
https://doi.org/10.1016/s0002-9149(02)03...
Harrison et al. conducted a meta-analysis comprising 14 randomized controlled trials, including 1,155 cardiac surgery patients, to explore the levosimendan safety and efficacy profile grouped by LVEF.99. Harrison RW, Hasselblad V, Mehta RH, Levin R, Harrington RA, Alexander JH. Effect of Levosimendan on Survival and Adverse Events after Cardiac Surgery: A Meta-analysis. J Cardiothorac Vasc Anesth. 2013;27(6):1224-32. doi: 10.1053/j.jvca.2013.03.027.
https://doi.org/10.1053/j.jvca.2013.03.0...
The patients were classified into low or preserved-LVEF groups with a mean of LVEF< 40% or LVEF> 40%, respectively. Data analysis demonstrated a significant decrease in the levosimendan death risk, and the subgroup analysis showed that this was only confined to the low-LVEF studies. No benefit was observed in the “preserved-LVEF group”. Further analysis revealed that the “low-LVEF group” patients receiving levosimendan significantly decreased the postoperative AF incidence. The preserved-LVEF group showed no difference as well. Our findings demonstrated that levosimendan did not significantly change the AF incidence in LVEF>40% and LVEF≤40% subgroups.
A previous study showed that a 6-24 μg/kg bolus dose delivered in 10 min followed by a 0.05 to 0.2 μg/kg/min infusion rate is the optimum levosimendan dosing regimen.4242. Nieminen MS, Akkila J, Hasenfuss G, Kleber FX, Lehtonen LA, Mitrovic V, et al. Hemodynamic and Neurohumoral Effects of Continuous Infusion of Levosimendan in Patients with Congestive Heart Failure. J Am Coll Cardiol. 2000;36(6):1903-12. doi: 10.1016/s0735-1097(00)00961-x.
https://doi.org/10.1016/s0735-1097(00)00...
Papp Z et al. suggested another levosimendan regimen, a 6-12 μg/kg delivered in 10 min followed by 0.05 or 0.1 or 0.2 μg/kg/min for 24 h.4343. Papp Z, Agostoni P, Alvarez J, Bettex D, Bouchez S, Brito D, et al. Levosimendan Efficacy and Safety: 20 Years of SIMDAX in Clinical Use. J Cardiovasc Pharmacol. 2020;76(1):4-22. doi: 10.1097/FJC.0000000000000859.
https://doi.org/10.1097/FJC.000000000000...
Since dobutamine has a few minutes half-life, while levosimendan’s half-life is about one hour, the dobutamine hemodynamic effects can be observed immediately following the infusion, while the immediate effect can be observed only with a large dose of levosimendan. High doses of levosimendan were associated with arrhythmias in cases of hypovolemia or initial hypotension.4444. Nieminen MS, Buerke M, Cohen-Solál A, Costa S, Édes I, Erlikh A, et al. The Role of Levosimendan in Acute Heart Failure Complicating Acute Coronary Syndrome: A Review and Expert Consensus Opinion. Int J Cardiol. 2016;218:150-7. doi: 10.1016/j.ijcard.2016.05.009.
https://doi.org/10.1016/j.ijcard.2016.05...
,4545. Harjola VP, Giannakoulas G, von Lewinski D, Matskeplishvili S, Mebazaa A, Papp Z, et al. Use of Levosimendan in Acute Heart Failure. Eur Heart J Suppl. 2018;20(Suppl I):2-10. doi: 10.1093/eurheartj/suy039.
https://doi.org/10.1093/eurheartj/suy039...
Our findings demonstrated that a large levosimendan bolus dose (≥12 μg/kg) was linked to a high AF incidence, and a small levosimendan bolus dose (<12 μg/kg) was linked to a low AF incidence. Experts in the European consensus on levosimendan usage during the perioperative period do not recommend high-dose administration. When high-dose administration is required, most of them recommend reducing the dose.3939. Toller W, Heringlake M, Guarracino F, Algotsson L, Alvarez J, Argyriadou H, et al. Preoperative and Perioperative Use of Levosimendan in Cardiac Surgery: European Expert Opinion. Int J Cardiol. 2015;184:323-36. doi: 10.1016/j.ijcard.2015.02.022.
https://doi.org/10.1016/j.ijcard.2015.02...
Nieminen et al. demonstrated that IV levosimendan administration for 24 h leads to dose-dependent hemodynamic effects stating a clear correlation between them. Its active protein-bound metabolites OR-1855 and OR-1896 exert clinical effects for up to seven days.4646. Antila S, Pesonen U, Lehtonen L, Tapanainen P, Nikkanen H, Vaahtera K, et al. Pharmacokinetics of Levosimendan and its Active Metabolite OR-1896 in Rapid and Slow Acetylators. Eur J Pharm Sci. 2004;23(3):213-22. doi: 10.1016/j.ejps.2004.07.005.
https://doi.org/10.1016/j.ejps.2004.07.0...
The presence of the long-acting metabolite means that hemodynamic effects continue for a week following the levosimendan infusion, and the possibility of adverse reactions also increases with time. This research meta-analysis revealed that levosimendan was significantly linked to a high AF risk with more than seven days of follow-up. Levosimendan tended to increase the risk of AF when follow-up was less than or equal to seven days. A large randomized controlled study is warranted.
As far as we know, this is the first research to analyze the levosimendan and AF risk correlation based on the timing of administration, levosimendan dose, and the length of follow-up. We rigorously screened the literature and included all eligible RCTs containing levosimendan and AF data. This research had various limitations. First, some outcome assessments had moderate or high heterogeneity, so we did many subgroup analyses for every result to investigate the heterogeneity source. Additionally, we did a sensitivity analysis through high-bias risk studies exclusion, which did not change the main results. Second, because the sample size of some studies is very small, which does not bring enough evidence, large clinical trials with convincing evidence are necessary to solve this situation.
Conclusions
High non-postoperative AF and low postoperative AF were linked to levosimendan, according to the meta-analysis conducted in this study. Our findings demonstrated that a large bolus dose of levosimendan was linked to a high AF incidence, and a small bolus levosimendan dose was linked to a low AF incidence. The levosimendan usage was considerably linked to a high AF risk with more than seven days of follow-up. Levosimendan tended to increase the risk of AF when follow-up was less than or equal to seven days. Further high-quality clinical studies are necessary to confirm our findings.
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39Toller W, Heringlake M, Guarracino F, Algotsson L, Alvarez J, Argyriadou H, et al. Preoperative and Perioperative Use of Levosimendan in Cardiac Surgery: European Expert Opinion. Int J Cardiol. 2015;184:323-36. doi: 10.1016/j.ijcard.2015.02.022.
» https://doi.org/10.1016/j.ijcard.2015.02.022 -
40Kowalczyk M, Banach M, Lip GY, Kozlowski D, Mikhailidis DP, Rysz J. Levosimendan - A Calcium Sensitising Agent with Potential Anti-arrhythmic Properties. Int J Clin Pract. 2010;64(8):1148-54. doi: 10.1111/j.1742-1241.2010.02396.x.
» https://doi.org/10.1111/j.1742-1241.2010.02396.x -
41Maisel WH, Stevenson LW. Atrial Fibrillation in Heart Failure: Epidemiology, Pathophysiology, and Rationale for Therapy. Am J Cardiol. 2003;91(6):2-8. doi: 10.1016/s0002-9149(02)03373-8.
» https://doi.org/10.1016/s0002-9149(02)03373-8 -
42Nieminen MS, Akkila J, Hasenfuss G, Kleber FX, Lehtonen LA, Mitrovic V, et al. Hemodynamic and Neurohumoral Effects of Continuous Infusion of Levosimendan in Patients with Congestive Heart Failure. J Am Coll Cardiol. 2000;36(6):1903-12. doi: 10.1016/s0735-1097(00)00961-x.
» https://doi.org/10.1016/s0735-1097(00)00961-x -
43Papp Z, Agostoni P, Alvarez J, Bettex D, Bouchez S, Brito D, et al. Levosimendan Efficacy and Safety: 20 Years of SIMDAX in Clinical Use. J Cardiovasc Pharmacol. 2020;76(1):4-22. doi: 10.1097/FJC.0000000000000859.
» https://doi.org/10.1097/FJC.0000000000000859 -
44Nieminen MS, Buerke M, Cohen-Solál A, Costa S, Édes I, Erlikh A, et al. The Role of Levosimendan in Acute Heart Failure Complicating Acute Coronary Syndrome: A Review and Expert Consensus Opinion. Int J Cardiol. 2016;218:150-7. doi: 10.1016/j.ijcard.2016.05.009.
» https://doi.org/10.1016/j.ijcard.2016.05.009 -
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» https://doi.org/10.1093/eurheartj/suy039 -
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Study associationThis study is not associated with any thesis or dissertation work.
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Ethics approval and consent to participateThis article does not contain any studies with human participants or animals performed by any of the authors.
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Sources of funding: This study was partially funded by Guangxi Health Commission key Laboratory of Emergency and Critical Medicine (The Second Affiliated Hospital of Guangxi Medical University) and the High-level Medical Expert Training Program of Guangxi “139” Plan Funding (G201903027).
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Publication Dates
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Publication in this collection
19 Aug 2024 -
Date of issue
July 2024
History
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Received
12 Dec 2023 -
Reviewed
26 Mar 2024 -
Accepted
03 Apr 2024