Clinical Outcome and Risk Factors for Acute Fulminant Myocarditis Supported by Venoarterial Extracorporeal Membrane Oxygenation: an Analysis of Nationwide CSECLS Database in China Mainland

Abstract

Purpose: To assess the outcomes and risk factors for adult patients with acute fulminant myocarditis supported with venoarterial extracorporeal membrane oxygenation (VA ECMO) in China mainland. Methods: Data were extracted from Chinese Society of ExtraCorporeal Life Support (CSECLS) Registry database. Data from adult patients who were diagnosed with acute myocarditis and needed VA ECMO in the database were retrospectively analyzed. The primary outcome was 90-day mortality after ECMO initiation in patients with acute fulminant myocarditis supported with VA ECMO. Cox proportional hazard regression model was used to examine the risk factors associated with 90-day mortality. Results: Among 221 patients enrolled, 186 (84.2%) patients weaned from ECMO and 159 (71.9%) patients survived to 90 days. The median age was 38 years (IQR 29-49) and males (n=115) accounted for 52.0% of the patients. The median ECMO duration was 134 hours (IQR 96-177hrs). The main adverse events during ECMO course was bleeding (16.3%), followed by infection (15.4%). In the multivariate Cox model, cardiac arrest prior to ECMO initiation (adjusted HR 2.529; 95%CI: 1.341-4.767, p =0.004), lower pH value (adjusted HR 0.016; 95%CI: 0.010-0.059, p <0.001) and higher lactate concentration at 24 hours after ECMO initiation (adjusted HR 1.146; 95%CI: 1.075-1.221, p <0.001) was associated with 90day mortality. Conclusions: In our study, 71.9% patients with acute fulminant myocarditis supported with VA ECMO survived to 90 days. Cardiac arrest prior to ECMO, lower pH and higher lactate concentration at 24 hours after ECMO initiation were correlated with 90-day mortality closely.ClinicalTrials.gov registration number: NCT04158479, Registered 8 November 2019, https://clinicaltrials.gov/ct2/show/NCT04158479?term=hou+xiaotong&draw=2&rank=2.