A pre- experimental study to “evaluate the effectiveness of self instructional module on knowledge about coronary angiography among patients undergoing coronary coronary angiography in selected hospitals, salem” Introduction: In India an estimated 2.27 million people died due to cardiovascular disease during 1990, and according to projections the number of deaths due to IHD was increase from 1.17 million in 1990 to 1.59 million in 2000 and 2.03 million by2010. The aim of the study was to prepare and validate the self instructional module on knowledge about coronary angiography.