A preliminary study of the effects of cardiac procedures on cognitive performance.

The effects of three commonly performed cardiac procedures on cognitive performance were evaluated in patients undergoing coronary artery bypass graft (CABG) surgery (N = 20), percutaneous transluminal coronary angioplasty (PTCA) procedure (N = 8), or cardiac valve repair (N = 11). Patients completed a neuropsychological test battery on the day prior to their surgery and at discharge. Results showed that valve and CABG patients exhibited declines in performance on the Digit Symbol subtest, while PTCA patients did not change. Reaction time performance improved for the PTCA patients but declined significantly for valve patients. These results suggest that common cardiac procedures may have measurable effects on cognitive performance, as assessed by a relatively brief test battery.