Abstract 19724: Renoprotective Effect of Remote Ischemic Peri-conditioning During Air Medical Transport of Patients With ST-segment Elevation Myocardial Infarction

Abstract

Background: Acute kidney injury (AKI) manifesting as acute increase in serum creatinine is a recognized complication to cardiac catheterization. Patients with ST-segment elevation myocardial infarction (STEMI) treated by primary percutaneous coronary intervention (PCI) have a markedly increased risk of developing AKI. At present, there is no universally accepted strategy for prevention of AKI in the setting of primary PCI. We assessed whether remote ischemic peri-conditioning (RIPC) stimulus during ambulance transport of STEMI patient would reduce the rate of creatinine rise post primary PCI. Method: We evaluated STEMI patients transferred to two hospitals participating in the National Cardiovascular Data Registry (NCDR) Acute Coronary Treatment Intervention Outcomes Network Registry-Get With the Guidelines (ACTION Registry-GWTG) between March, 2013 and March, 2015. Patients were transferred by an air medical critical care service utilizing RIPC as part of a standard protocol and compared to controls matched by referring location/facility. Patient demographics, clinical characteristics, treatments, cardiac biomarkers, left ventricular function, serum creatinine and rate of any increase in creatinine post PCI were compared by the presence or absence of RIPC during transport. Results: Out of the 221 STEMI patients (Age, 63±12.7 yrs; 32.6% female) in this analysis, 107 received RIPC and 114 did not. Baseline characteristics were similar between the two groups. RIPC group had significantly lower rate of creatinine rise post PCI (38.6% vs 55.2%; OR, 1.40; CI, 1.03-1.90; p=0.03) despite having similar baseline serum creatinine (median (IQR), 1.0(0.36) mg/dl vs. median (IQR), 1.0(0.4) mg/dl; p=0.46). In multivariable logistic regression analysis adjusting for demographic factors and clinical characteristics, RIPC (OR, 1.62; CI, 1.12-2.35; p=0.01) was independently associated with lower rate of creatinine rise post PCI. Conclusion: Among patients with STEMI undergoing primary PCI, RIPC before hospital arrival compared with no RIPC was associated with significantly lower rate of creatinine rise post PCI. The use of RIPC as a potential renoprotective strategy for STEMI patients warrants further investigation.