Abstract
To assess whether the use of either the on-pump or the off-pump method affects changes in health-related quality of life (QOL) in the long term after coronary artery bypass graft (CABG) surgery. Four hundred and fifty-two (89.0%) of the 508 patients in a single institution were operated on-pump and 56 (11.0%) were operated off-pump. The RAND-36 Health Survey (RAND-36) was used as an indicator of QOL. Assessments were performed preoperatively and repeated 1 year and 12 years later. Symptomatic status was estimated according to New York Heart Association class. After 1 year, on-pump patients improved significantly (P<0.001) in all eight RAND-36 dimensions. Also, in off-pump patients, positive changes were observed in all RAND-36 dimensions and these changes were statistically significant (P<0.05) in six dimensions. Despite an ongoing decrease in QOL over the 12-year follow-up, on-pump patients still maintained a significant (P<0.05) improvement in all and off-pump patients in seven out of eight RAND-36 dimensions. A highly significant (P<0.001) pattern of change after 1 year was observed in the RAND-36 Mental Component Summary and Physical Component Summary scores in both operative groups, and despite the general declining trend, significant improvement was maintained during the 12-year follow-up time. Both groups showed almost identical relief from anginal symptoms at 12 years. A majority of patients experience significant improvement in health-related QOL in the long term after CABG. Cardiopulmonary bypass has no impact on patients' subsequent health-related QOL.
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