Published online Apr 26, 2022. doi: 10.4330/wjc.v14.i4.250
Peer-review started: December 5, 2021
First decision: January 25, 2022
Revised: February 9, 2022
Accepted: March 27, 2022
Article in press: March 27, 2022
Published online: April 26, 2022
Processing time: 134 Days and 16.1 Hours
Vasoplegia is a common complication of cardiac surgery but its causal relationship with preoperative use of renin angiotensin system (RAS) blockers [angiotensin converting enzyme inhibitors (ACEIs) and angiotensin receptor blockers (ARB)] is still debated.
To update and summarize data on the effect of preoperative use of RAS blockers on incident vasoplegia.
All published studies from MEDLINE, EMBASE, and Web of Science providing relevant data through January 13, 2021 were identified. A random-effects meta-analysis method was used to pool estimates, and post-cardiac surgery shock was differentiated from vasoplegia.
Ten studies reporting on a pooled population of 15672 patients (none looking at ARBs exclusively) were included in the meta-analysis. All were case-control studies. Use of ACEIs was associated with an increased risk of vasoplegia [pooled adjusted odds ratio (Aor) of 2.06, 95%CI: 1.45-2.93] and increased inotropic/vasopressor support requirement (pooled aOR 1.19, 95%CI: 1.10-1.29). Post-cardiac surgery shock was increased in the presence of left ventricular dysfunction (pooled aOR 2.32, 95%CI: 1.60-3.36; I2 49%) but not increased by the use of beta blockers (pooled aOR 0.78, 95%CI: 0.36-1.69; I2 77%). Two randomized control trials (RCTs), not eligible for the meta-analysis, did not show an association between continuation of RAS blockers and vasoplegia.
Preoperative continuation of ACEIs is associated with an increased need for inotropic support postoperatively and with an increased risk of vasoplegia in observational studies but not in RCTs. The absence of a consensus definition of vasoplegia should lead to the use of perioperative cardiovascular monitoring when designing RCTs to better understand this discrepancy.
Core Tip: Vasoplegia is a common complication of cardiac surgery but its causal relationship with preoperative use of renin angiotensin system blockers, mainly angiotensin converting enzyme inhibitors (ACEIs), is still debated. The meta-analysis of observational studies suggests that preoperative continuation of ACEIs is associated with an increased risk of vasoplegia and of the use of inotropic support postoperatively. However, these associations were not observed in two included randomized controlled trials with limited power. These findings support the potential benefit of holding ACEIs prior to cardiac surgery to reduce the risk of vasoplegia and associated adverse outcomes. However, well-powered randomized controlled trials using a consensus definition of vasoplegia are still needed to properly assess management strategies of RAS blockers in the perioperative setting.