Tobacco smoking is one of the common cause of the preventable deaths globally. It contains nicotine which causes physi cal and psychological dependencies in creases the blood coagulability and causes conduction block, re-entry and ventricular fibrillation. Cigarette components causing cardiovascular abnormalities as sessed by doing cheapest method ECG. Material and Methods: A prospective case control study was done on 100 smokers and 100 non smokers. Detailed clinical examination was done to

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... e out any other physical illness. BP and 12 lead ECG were done in all participants.Systolic blood pressure, diastolic blood pressure, Resting heart rate, the p wave, the PR interval,the QRS complex,QTc(corrected QT interval),ST segment,T wave abnormalities were assesed in both group and statstical analysis was done by unpaired T test. Result: Prevalence of hypertension was higher in smoker's.A significant correlation with elevated systolic blood pressure,diastolic blood pressure and mean arterial blood pressure was noted.(p ≤ 0.01).The heart rate was increased in smokers which was statstically significant.The RR interval,The analysis showed that QTc interval was short ened and that the QRS complex duration was widened the QT interval and the ST segment were shortened as compared to those in the non smokers which was highly significant statstically.QTc interval was shortened and that the QRS complex duration was widened in the smokers, although the values did not show any statistical sig nificance. Conclusion: ECG is an important tool in predicting cardiovascular morbidity in smokers.Not only the ST-T changes or chamber hypertrophy but also resting heart rate, PR inerval and QT interval should be measured in smokers periodically to predict cardiovascular involvement early.