Ninety consecutive acute anterior myocardial infarction patients with heavy thrombosis burden -LSB- ( @ @ ) years old -RSB- were randomly assigned to thrombus aspiration group ( Group A , n = @ ) , thrombus aspiration and intracoronary tirofiban bolus ( @ g/kg prior to the first balloon inflation , Group B , n = @ ) , thrombus aspiration and intracoronary tirofiban combined with nitroprusside bolus ( @ g prior to the first balloon inflation , Group C , n = @ ) with random number table .