Kinnaird T, Gallagher S, Spratt JC, et al. - Given that complex high-risk and indicated revascularization using percutaneous coronary intervention (CHIP-PCI) represents an emerging concept that is inadequately examined, so, researchers assessed temporal changes in CHIP-PCI volumes, as well as the link between operator CHIP-PCI volume and patient results. They examined data on all CHIP-PCI procedures done for stable angina in England and Wales between 2007 and 2014. A rise from 28.1% in 2007 to 36.2% in 2014 was noted in CHIP-PCI as a percentage of total PCI. Overall 30,268 CHIP-PCI cases were done between 2012 and 2014. A greater degree of patient comorbidity and increasing procedural complexity were observed in relation to higher operator volumes. A link with increasing operator CHIP-PCI volumes was demonstrated by factors such as in-hospital major bleeding, access site complications and coronary perforation, following adjustment for baseline difference. In contemporary PCI practice, CHIP-PCI cases represent an increasingly large population. There was no link between higher operator volumes and improved 12-month survival.