IL6R and ST Elevation Myocardial Infarction: Higher plasma IL-6 and lower sIL-6R/IL-6 (soluble interleukin-6 receptor/interleukin-6) ratio early after ST-elevation myocardial infarction (STEMI) presentation are independently correlated with larger infarct size, reperfusion injury, and left ventricular dysfunction and a higher likelihood for left ventricular remodeling [9, 10].