Type 2 diabetes mellitus increases the mortality risk after acute coronary syndrome treated with coronary artery bypass surgery

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Eilon Ram 1 2, Leonid Sternik 3 4, Robert Klempfner 5 4, Zaza Iakobishvili 4 6, Enrique Z Fisman 4, Alexander Tenenbaum 4, Elchanan Zuroff 3 4, Yael Peled 5 4, Ehud Raanani 3 4

Main idea: While type 2 DM did not influence the in-hospital mortality hazard, we showed that the presence of DM among patients with ACS referred to CABG, is a powerful risk factor for long-term mortality, especially when insulin was included in the diabetic treatment strategy.

Abstract

Background: Type 2 diabetes mellitus (DM) is a risk factor for cardiovascular diseases and is common among patients undergoing coronary artery bypass grafting (CABG) surgery. The main objective of our study was to investigate the impact of DM type 2, and its treatment subgroups, on short- and long-term mortality in patients with acute coronary syndrome (ACS) who undergo CABG.

Methods: The study included 1307 patients enrolled from the biennial Acute Coronary Syndrome Israeli Survey between 2000 and 2016, who were hospitalized for ACS and underwent CABG. Of them, 527 (40%) patients were with and 780 (60%) were without DM. Results: The diabetic group of patients comprised more women and had more comorbidities such as hypertension, dyslipidemia, renal impairment, peripheral vascular disease and prior ischemic heart disease. Overall 30-day mortality rate was similar between DM and non-DM patients (4.2% vs. 4% p = 0.976) Ten-year mortality rate higher in DM compared with non-diabetic patients. Multivariable analysis showed that DM increased the mortality hazard by 1.61-fold.

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