Patients who underwent invasive coronary artery bypass grafting or stent implantation experienced thinking and memory deficits after the procedures, a German study found. Researchers examined the cognition of 37 patients who underwent stent placement and 47 subjected to CABG, and noted that the health state of CABG patients was worse than those who underwent stenting. However, "cognitive decline after these procedures more relates to the severity of the atherosclerosis than the procedure itself," a U.S. expert said.

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