Methods
90 consecutive cases of primary PCI were reviewed. Included were only cases in which pre-stenting devices (balloons and /or thrombectomy) were used ( n = 64). TFC was obtained by conventional methodology for each individual injection before and after stenting. The average of these scores served as pre and post TFC. The Mac-Labs reports were reviewed for special events of worsening chest pain post stenting, markedly more pronounced ST elevation, severe bradycardia or AV-block, or hypotension requiring inotropes. The angiograms were evaluated for evidence of new embolization occurring during stenting.