Insulin resistance and nonalcoholic fatty liver disease (NAFLD) frequently associate with type 2 diabetes (T2D) and cardiovascular disease and worsen their prognosis. We hypothesized that people with recent myocardial infarction (MI) have lower left ventricular ejection fraction (EF) and higher degree of insulin resistance (IR) , hepatocellular lipid content (HCL) and risk of hepatic fibrosis than matched people without MI. Thus, participants of the “DIabetes and ST-Elevation MI (DISTEMI) Study” were examined 6-12 weeks after MI (MI+; n=53, 28% T2D) and compared to age-, sex-, BMI-matched people without MI (MI-; n=48, 31% T2D) . Insulin sensitivity was assessed during fasting (Homeostasis Model Assessment (HOMA) 2-IR) and hyperinsulinemic-euglycemic clamps (M-value) . EF, HCL and liver stiffness, associated with fibrosis stages, were quantified by 1H-magnetic resonance imaging, spectroscopy and elastography, respectively. MI+ had a lower EF (47±2 vs. 58±1 %, p<0.0001) and M-value (7.3±0.4 vs. 8.2±0.4 mg*kg-1*min-1, p<0.05) compared to MI-, which was mainly due to a difference between the T2D groups (EF: 39±6 vs. 52±2 %, p<0.001; M-value: 4.2±0.5 vs. 6.1±0.6 mg*kg-1*min-1, p<0.05) . HCL (3.4±0.8 vs. 5.8±0.9 %) and liver stiffness (2.2±0.1 vs. 2.3±0.1 kPa) were comparable between MI+ and MI-. HCL correlated negatively with M-value (r=-0.95, p<0.05) and positively with systolic blood pressure (r=0.91, p<0.05) in MI+ with T2D. In MI+ without T2D, HCL correlated positively with HOMA2-IR (r=0.58, p<0.01) and BMI (r=0.53, p<0.01) .
In conclusion, recent myocardial infarction in people with type 2 diabetes associates with decreased ejection fraction and increased insulin resistance. The correlation between insulin resistance and liver fat content suggests that HCL can serve as a non-invasive cardiovascular marker and may identify persons with a worse outcome after myocardial infarction.
C.Möser: None. M.Roden: Advisory Panel; Eli Lilly and Company, Research Support; Boehringer Ingelheim International GmbH, Nutricia, Speaker's Bureau; Novo Nordisk. O.P.Zaharia: n/a. F.C.Michlotti: None. Y.Kupriyanova: None. V.Schrauwen-hinderling: None. P.Bobrov: None. V.Burkart: None. M.Kelm: Board Member; DGIM-Deutsche Geselleschaft für Innere Medizin, DGK-Deutsche Gesellschaft für Kardiologie, DSHF-Deutsche Stiftung für Herzforschung, ESC- European Society of Cardiology, Other Relationship; Abiomed , Bayer AG, diaplan, Kel Con GmbH, Research Support; Abiomed Europe GmbH, B.Braun, Edwards Lifesciences Corporation, European Union, IPP Med GmbH - Institut für Pharmakologie u. präventive Medizin GmbH, Mars Scientific Advisory Council (MSAC) , Medicure Inc., Microvision Medical. J.M.Szendroedi: Consultant; Boehringer Ingelheim International GmbH.
Research Network SFB 1116 of the German Research Foundation