Relation Between White Blood Cell Count and Final Infarct Size in Patients With ST-Segment Elevation Acute Myocardial Infarction Undergoing Primary Percutaneous Coronary Intervention (from the INFUSE AMI Trial)

Although it has been shown that elevated white blood cell count (WBCc) on presentation is associated with an increased risk of cardiac mortality in patients with ST-segment elevation myocardial infarction (STEMI), the responsible mechanisms are unknown. We therefore sought to investigate whether elevated WBCc is associated with increased infarct size measured with cardiac magnetic resonance imaging 30 days after primary percutaneous coronary intervention in the Intracoronary Abciximab and Aspiration Thrombectomy in Patients With Large Anterior Myocardial Infarction trial. INFUSE AMI randomized patients with STEMI and proximal or mid–left anterior descending coronary artery occlusion to bolus intracoronary abciximab versus no abciximab and to manual aspiration versus no aspiration. WBCc at hospital admission was available in 407 of 452 randomized patients. Patients were stratified according to tertiles of WBCc. At 30 days, a significant stepwise increase in infarct size (percentage of total left ventricular mass) was apparent across tertiles of increasing WBCc (median [interquartile range] for tertiles I vs II vs III = 11.2% [3.8% to 19.6%] vs 17.5% [0.5% to 22.9%] vs 19.1% [13.7 to 26.0], respectively, p

Source: The American Journal of Cardiology - September 23, 2013 Category: Cardiology Authors: Tullio Palmerini, Sorin J. Brener, Philippe Genereux, Akiko Maehara, Diego Della Riva, Andrea Mariani, Bernhard Witzenbichler, Jacek Godlewski, Helen Parise, Jan-Henk E. Dambrink, Andrzej Ochala, Martin Fahy, Ke Xu, C. Michael Gibson, Gregg W. Stone Tags: Coronary Artery Disease Source Type: research