Percent of patients, age 18 years and older, undergoing isolated PCI procedure (defined by no CABG or other major surgery during episode of care) who have an intra or post procedure stroke (i.e., any confirmed a loss of neurological function caused by an ischemic or hemorrhagic event with residual symptoms) lasting at least 24 hours after onset or leading to death. This measure evaluates the occurrence of stroke as an outcome of a percutaneous coronary intervention (PCI) during a patient’s episode of care.