there were no significant differences for the following variables : age , sex , diabetes mellitus , smoking , positive family history , hypertension , obesity , previous infarction , history of unstable angina , heart failure or chronic obstructive pulmonary disease ( copd ) , killip class in the coronary care unit ( ccu ) , arrhythmias and conduction defects in the ccu as well as drugs used .
C0003811
arrhythmias
C0264886
conduction defects