This is a randomized , 1:1 , double-blind , placebo-controlled clinical trial.The study takes place at two centers in Chile : University of Chile Clinical Hospital and San Borja Arriarn Clinical Hospital.The subjects will be 134 adults with acute myocardial infarction with indication for percutaneous coronary angioplasty.This intervention is being performed as a pilot study , involving high-dose vitamin C infusion plus oral administration of vitamin E ( Vitamin-treatment group ) or placebo ( Control group ) during the angioplasty procedure .