Ankur Vyas1, Paul S Chan2, Peter Cram2, Brahmajee K Nallamothu2, Bryan McNally2, Saket Girotra2. 1. From the Division of Cardiology, Department of Internal Medicine, University of Iowa Hospitals and Clinics, Iowa City (A.V., S.G.); Division of Cardiology, Department of Internal Medicine, Saint Luke's Mid America Heart Institute, Kansas City (P.S.C.); Division of General Internal Medicine, Department of Internal Medicine, Mt Sinai/UHN Hospitals, Toronto, ON Canada (P.C); Veterans Affairs Ann Arbor Health Services Research and Development Center of Excellence and the Division of Cardiology, Department of Internal Medicine, University of Michigan, Ann Arbor (B.K.N); and Department of Emergency Medicine, Emory University School of Medicine, Atlanta (B.M.). ankurvyas7@gmail.com. 2. From the Division of Cardiology, Department of Internal Medicine, University of Iowa Hospitals and Clinics, Iowa City (A.V., S.G.); Division of Cardiology, Department of Internal Medicine, Saint Luke's Mid America Heart Institute, Kansas City (P.S.C.); Division of General Internal Medicine, Department of Internal Medicine, Mt Sinai/UHN Hospitals, Toronto, ON Canada (P.C); Veterans Affairs Ann Arbor Health Services Research and Development Center of Excellence and the Division of Cardiology, Department of Internal Medicine, University of Michigan, Ann Arbor (B.K.N); and Department of Emergency Medicine, Emory University School of Medicine, Atlanta (B.M.).
Abstract
BACKGROUND: Although out-of-hospital cardiac arrest is common because of acute myocardial infarction, it is unknown whether early coronary angiography is associated with improved survival in these patients. METHODS AND RESULTS: Using data from the Cardiac Arrest Registry to Enhance Survival (CARES), we identified 4029 adult patients admitted to 374 hospitals after successful resuscitation from out-of-hospital cardiac arrest because of ventricular fibrillation, pulseless ventricular tachycardia, or unknown shockable rhythm between January 2010 and December 2013. Early coronary angiography (occurring within one calendar day of cardiac arrest) was performed in 1953 (48.5%) patients, of whom 1253 (64.2%) received coronary revascularization. Patients who underwent early coronary angiography were younger (59.9 versus 62.0 years); more likely to be men (78.1% versus 64.3%), have a witnessed arrest (84.6% versus 77.4%), and have ST-segment-elevation myocardial infarction (32.7% versus 7.9%); and less likely to have known cardiovascular disease (22.8% versus 35.0%), diabetes mellitus (11.0% versus 17.0%), and renal disease (1.8% versus 5.8%; P<0.01 for all comparisons). In analysis of 1312 propensity score-matched pairs, early coronary angiography was associated with higher odds of survival to discharge (odds ratio 1.52 [95% confidence interval 1.28-1.80]; P<0.0001) and survival with favorable neurological outcome (odds ratio 1.47 [95% confidence interval 1.25-1.71]; P<0.0001). Further adjustment for coronary revascularization in our models significantly attenuated both odds ratios, suggesting that revascularization was a key mediator of the survival benefit. CONCLUSIONS: Among initial survivors of out-of-hospital cardiac arrest caused by VF or pulseless VT, we found early coronary angiography was associated with higher odds of survival to discharge and favorable neurological outcome.
BACKGROUND: Although out-of-hospital cardiac arrest is common because of acute myocardial infarction, it is unknown whether early coronary angiography is associated with improved survival in these patients. METHODS AND RESULTS: Using data from the Cardiac Arrest Registry to Enhance Survival (CARES), we identified 4029 adult patients admitted to 374 hospitals after successful resuscitation from out-of-hospital cardiac arrest because of ventricular fibrillation, pulseless ventricular tachycardia, or unknown shockable rhythm between January 2010 and December 2013. Early coronary angiography (occurring within one calendar day of cardiac arrest) was performed in 1953 (48.5%) patients, of whom 1253 (64.2%) received coronary revascularization. Patients who underwent early coronary angiography were younger (59.9 versus 62.0 years); more likely to be men (78.1% versus 64.3%), have a witnessed arrest (84.6% versus 77.4%), and have ST-segment-elevation myocardial infarction (32.7% versus 7.9%); and less likely to have known cardiovascular disease (22.8% versus 35.0%), diabetes mellitus (11.0% versus 17.0%), and renal disease (1.8% versus 5.8%; P<0.01 for all comparisons). In analysis of 1312 propensity score-matched pairs, early coronary angiography was associated with higher odds of survival to discharge (odds ratio 1.52 [95% confidence interval 1.28-1.80]; P<0.0001) and survival with favorable neurological outcome (odds ratio 1.47 [95% confidence interval 1.25-1.71]; P<0.0001). Further adjustment for coronary revascularization in our models significantly attenuated both odds ratios, suggesting that revascularization was a key mediator of the survival benefit. CONCLUSIONS: Among initial survivors of out-of-hospital cardiac arrest caused by VF or pulseless VT, we found early coronary angiography was associated with higher odds of survival to discharge and favorable neurological outcome.
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