Absolute ST segment elevation at the beginning of the primary percutaneous coronary intervention procedure (A), after guidewire passage (B), after thrombus aspiration (C) and at the end of the procedure (F). Absolute ST segment elevation at the beginning of the primary percutaneous coronary intervention procedure (A), after guidewire passage (B), after thrombus aspiration (C) and at the end of the procedure (F). Paul Russhard et al. Open Heart 2016;3:e000430 ©2016 by British Cardiovascular Society