<p> </p> <p class="MsoNormal" style="text-align:justify"><span lang="EN-IN">Several studies and reports are present in which there is serum hypo magnesium when acute myocardial infarction was diagnosed. Several studies have reported and tagged magnesium deficiency with poor prognostic outcome in patients who have myocardial infarction. The role of magnesium in treating arrhythmias due to acute myocardial infarction (AMI) has been controversial and never the study was totally formally conducted. Most of the studies have reported a significant reduction in the mortality and frequency of arrhythmias in patients with AMI with magnesium treatment. This study was done with the main purpose of studying serum levels of Mg in these patients, in order to establish possible relation between low levels of serum Mg and increased risk & associated poor prognosis in patients with acute MI. <o:p></o:p></span></p>