Inflammatory markers are considered in cardiovascular disease risk assessment and inflammation has an integral role in all aspects of coronary syndromes. It is the aim of this study to find the relationship between some inflammatory markers and electrical instability parameters in chronic myocardial infarction (CMI) patients. 24 CMI patients underwent 12 lead ECG (QT dispersion as the difference between the longest and shortest QT interval), signal averaged ECG (SAECG) (late ventricular potentials: LVP) and 64 electrodes body surface mapping (BSM) (isointegral and isopotential maps). We considered a patient having LVP (16 patients: 67%), if two of the following criteria were positive: QRS duration (SA-QRS) >120 ms, LAS40 (the duration of the signal at the end of the QRS complex with an amplitude below 40 mV) > 38 ms and RMS40 (the square root of the last 40 ms of the signal) < 20 mV. White blood cell count (WBC: 94004100/mm3) and erythrocyte sedimentation rate (ESR: 3128 mm/h) were also assessed. There was a good correlation between: ESR and SA- QRS (r=0.51), LAS40 (r=0.58), RMS40 (r=-0.52), QTdc (heart rate corrected QT dispersion) (r=0.54), QRST isointegral maxima (r=0.52), QRS isointegral minima (r=-0.60), isointegral Q40 minima (r=-0.76), QRS isopotential minima (r=- 0.60), ST isopotential maxima (r=0.55). WBC correlated with QRST isointegral maxima (r=0.52), isointegral ST maxima (r=0.55) and isointegral STT maxima (r=0.56). Inflammation increases sudden cardiac death risk in CMI patients.