SAN FRANCISCO – Pressure-controlled intermittent coronary sinus occlusion (PiCSO)-assisted primary percutaneous coronary intervention (pPCI) does not have a higher rate of adverse events, but does have increased contrast dye volume, longer procedure times and more radiation exposure than conventional PCI in patients with ST-elevation myocardial infarction (STEMI), an analysis of the PiCSO-AMI-I trial shows.