An SCAI consensus document calls for a new, "clinically meaningful" definition of myocardial infarction after PCI or bypass surgery to replace the "universal definition" that many experts believe is arbitrary and not indicative of post-procedural damage that might affect outcomes. The new standard would use the biomarker CK-MB rather then troponin. "We don't want to come out with a definitive statement saying this is the final word on MI definitions," said Dr. Issam Moussa, an SCAI fellow and the document's lead author. The new definition would be grounded in the best available data, but Moussa notes there is still limited evidence to support any threshold. "There is more science that needs to be done and there remains more uncertainty. We framed this to be inclusive and also to open the field for discussion," he said.