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Differential Prognostic Impact on Mortality of Myocardial Infarction Compared With Bleeding Severity in Contemporary Acute Coronary Syndrome Patients.

B. Caneiro-Queija,E. Abu-Assi,S. Raposeiras-Roubín,S. Manzano-Fernández,P. F. Flores Blanco,Á. López-Cuenca,R. Cobas-Paz,M. Gómez-Molina,J. M. Rodríguez-Rodríguez,F. Calvo-Iglesias,M. Valdés‐Chávarri,A. Iñíguez-Romo

Published 2018 in Revista Española de Cardiología

ABSTRACT

INTRODUCTION AND OBJECTIVES The impact on mortality of myocardial infarction (MI) compared with the specific degree of bleeding severity occurring after discharge in acute coronary syndrome is poorly characterized. Defining this relationship may help to achieve a favorable therapeutic risk-benefit balance. METHODS Using Cox-based shared frailty models, we assessed the relationship between mortality and postdischarge MI and bleeding severity-graded according to Bleeding Academic Research Consortium (BARC)-in 4229 acute coronary syndrome patients undergoing in-hospital coronary arteriography between January 2012 and December 2015. RESULTS Both MI (HR, 5.8; 95%CI, 3.7-9.8) and bleeding (HR, 5.1; 95%CI, 3.6-7.7) were associated with mortality. Myocardial infarction had a stronger impact on mortality than BARC type 2 and 3a bleedings: (RRr, 3.8 and 1.9; P < .05), respectively, but was equivalent to BARC type 3b (RRr, 0.9; P = .88). Mortality risk after MI was significantly lower than after BARC type 3c bleeding (RRr, 0.25; P < .001). Mortality was higher after an MI in patients on dual antiplatelet therapy (DAPT) at the time of the event (HR, 2.9; 95%CI, 1.8-4.5) than in those off-DAPT (HR, 1.5; 95%CI, 0.7-3.4). In contrast, mortality was lower after a bleeding event in patients on-DAPT (HR, 1.6; 95%CI, 1.1-2.6) than in those off-DAPT (HR, 3.2; 95%CI, 1.7-5.8). CONCLUSIONS The differential effect on mortality of a postdischarge MI vs bleeding largely depends on bleeding severity. The DAPT status at the time of MI or bleeding is a modifier of subsequent mortality risk.

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