Kevin R Bainey1, Sherali Rahim2, Krystal Etherington2, Michael L Rokoss2, Madhu K Natarajan2, James L Velianou2, Sonya Brons2, Shamir R Mehta3. 1. Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada. 2. Interventional Cardiology Research Group and Division of Cardiology, Department of Medicine, McMaster University, and Hamilton Health Sciences Hamilton, Ontario, Canada. 3. Interventional Cardiology Research Group and Division of Cardiology, Department of Medicine, McMaster University, and Hamilton Health Sciences Hamilton, Ontario, Canada. Electronic address: smehta@mcmaster.ca.
Abstract
BACKGROUND: It is unclear if holding angiotensin-converting enzyme inhibitors (ACEI) or angiotensin receptor blockers (ARB) prior to coronary angiography reduces contrast-induced acute kidney injury (AKI). We undertook a randomized trial to investigate the effect of holding ACEI/ARB therapy prior to coronary angiography on the incidence of AKI. METHODS: We randomly assigned 208 patients with moderate renal insufficiency (creatinine ≥ 1.7mg/dL within 3 months and/or documented creatinine ≥ 1.5mg/dL within 1 week before cardiac catheterization) to hold ACEI/ARB ≥24 hours preprocedure or continue ACEI/ARB. The primary outcome was the incidence of AKI defined as an absolute rise in serum creatinine of ≥0.5mg/dL from baseline and/or a relative rise in serum creatinine of ≥25% compared with baseline measured at 48 to 96 hours postcardiac catheterization. RESULTS: All patients were taking an ACEI (72.1%) or ARB (27.9%) prior to randomization. At 48 to 96 hours, the primary outcome occurred in 18.4% of patients who continued ACEI/ARB compared with 10.9% of the patients who held ACEI/ARB (hazard ratio 0.59, 95% CI 0.30-1.19, P = .16). In a prespecified secondary outcome, there was a lower rise in mean serum creatinine after the procedure in patients who held ACEI/ARB (0.3 ± 0.5 vs 0.1 ± 0.3mg/dL, P = .03). The clinical composite of death, myocardial infarction, ischemic stroke, congestive heart failure, rehospitalization for cardiovascular cause, or need for dialysis preprocedure occurred in 3.9% who continued ACEI/ARB compared with 0% who held the ACEI/ARB (hazard ratio 0.11, 95% CI 0.01-2.96, P = .06). CONCLUSION: In this pilot study of patients with moderate renal insufficiency undergoing cardiac catheterization, with-holding ACEI/ARB resulted in a non-significant reduction in contrast-induced AKI and a significant reduction in post-procedural rise of creatinine. This low cost intervention could be considered when referring a patient for cardiac catheterization.
RCT Entities:
BACKGROUND: It is unclear if holding angiotensin-converting enzyme inhibitors (ACEI) or angiotensin receptor blockers (ARB) prior to coronary angiography reduces contrast-induced acute kidney injury (AKI). We undertook a randomized trial to investigate the effect of holding ACEI/ARB therapy prior to coronary angiography on the incidence of AKI. METHODS: We randomly assigned 208 patients with moderate renal insufficiency (creatinine ≥ 1.7mg/dL within 3 months and/or documented creatinine ≥ 1.5mg/dL within 1 week before cardiac catheterization) to hold ACEI/ARB ≥24 hours preprocedure or continue ACEI/ARB. The primary outcome was the incidence of AKI defined as an absolute rise in serum creatinine of ≥0.5mg/dL from baseline and/or a relative rise in serum creatinine of ≥25% compared with baseline measured at 48 to 96 hours postcardiac catheterization. RESULTS: All patients were taking an ACEI (72.1%) or ARB (27.9%) prior to randomization. At 48 to 96 hours, the primary outcome occurred in 18.4% of patients who continued ACEI/ARB compared with 10.9% of the patients who held ACEI/ARB (hazard ratio 0.59, 95% CI 0.30-1.19, P = .16). In a prespecified secondary outcome, there was a lower rise in mean serum creatinine after the procedure in patients who held ACEI/ARB (0.3 ± 0.5 vs 0.1 ± 0.3mg/dL, P = .03). The clinical composite of death, myocardial infarction, ischemic stroke, congestive heart failure, rehospitalization for cardiovascular cause, or need for dialysis preprocedure occurred in 3.9% who continued ACEI/ARB compared with 0% who held the ACEI/ARB (hazard ratio 0.11, 95% CI 0.01-2.96, P = .06). CONCLUSION: In this pilot study of patients with moderate renal insufficiency undergoing cardiac catheterization, with-holding ACEI/ARB resulted in a non-significant reduction in contrast-induced AKI and a significant reduction in post-procedural rise of creatinine. This low cost intervention could be considered when referring a patient for cardiac catheterization.
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