May 2018 post
5/8/2018 9:00:00 AM
Levosimendan in Cardiac Surgery: The Evidence Adds Up
If we had a way to reduce the risk of life-threatening complications after cardiac surgery would we use it? Of course we would. It is for reason that this month’s blog post highlights the recent work of Dr. Qiang and colleagues . In the most up-to-date and comprehensive research of its kind these researchers identified and analyzed data from 25 randomized controlled trials (RCTs) that compared perioperative use of levosimendan with control (placebo, conventional inotropes or intra-aortic balloon pump) in 3247 adult cardiac surgery patients and reported an impressive array of benefits. The main results are that
1. Levosimendan reduced mortality after cardiac surgery (OR 0.63; P=0.001). This survival benefit was not confined to patients with markedly reduced left ventricular ejection fraction (LVRF): it extended to patients with LVEF up to 50%. So even patients with only moderate depression of LVEF gained from levosimendan treatment.
2. Levosimendan use also significantly reduced: the incidence of postoperative acute kidney injury (OR 0.55; P<0.0001), the use of renal replacement therapy use (OR 0.56; P=0.002), the duration of ICU stay (weighted mean difference [WMD] -0.49 day; P=0.0002), and the duration of mechanical ventilation (WMD -2.30 h; P=0.002).
Data of this sort make a strong case for the peri-operative use of levosimendan in adult cardiac surgery but they can’t answer every question. In particular, the outcomes of some recent randomized trials [2,3,4] points to the need for further work to define the optimal dose-range: Qiang and colleagues  suggest that adult cardiac surgery may be a situation where initial bolus dosing and a relatively high infusion rate may be needed to secure the full clinical benefit of levosimendan unique inodilator actions. If that proves indeed to be the case then the well-documented safety profile of levosimendan will by another feature favoring its use.
1. Qiang H et al. J Cardiovasc Pharmacol 2018 Publish Ahead of Print Apr 3. PMID: 29672418, DOI: 10.1097/FJC.0000000000000584
2. Landoni G et al. N Engl J Med. 2017;376(21):2021-2031
3. Mahta RH et al. N Engl J Med. 2017;376(21):2032-2042
4. Cholley B et al. JAMA. 2017;318(6):548-556