The experimental one group pretest and posttest design was used. A total 60 samples were selected by using simple random sampling technique. The data were collected Structural questionnaire, before and after structured teaching programme regarding prevention of myocardial infarction habits, diet, exercise, and life style changes. The results of post-intervention showed significant improvement in (P<0.05) knowledge score. The percentage differencesbetween pre-testand post -test score was analyzed using proportion with 95% Confidence interval which showed the effectiveness of structured teaching.