 - Who presented to the hospital within twelve 12 hours of the onset of chest pain -Who had ST segment elevation 1 mm in two contiguous limb leads or ST segment elevation 2 mm in two consecutive precordial leads or new onset of left bundle branch block LBBB in a twelve lead electrocardiogram and for whom the decision was made to be taken to the cath lab to perform angioplasty of the coronary vessels. 