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Ann Thorac Surg 2000;69:834-840
© 2000 The Society of Thoracic Surgeons

Original Articles

Craniocervical and aortic atherosclerosis as neurologic risk factors in coronary surgery

Tomoko Goto, MDa, Tomoko Baba, MDa, Atsushi Yoshitake, MDa, Yoshihiro Shibata, MDa, Masashi Ura, MDb, Ryuzo Sakata, MDb

a Department of Anesthesiology, Kumamoto Chuo Hospital, Kumamoto, Japan
b Department of Cardiovascular Surgery, Kumamoto Chuo Hospital, Kumamoto, Japan

Address reprint requests to Dr Goto, Department of Anesthesiology, Kumamoto Chuo Hospital, 96 Tainoshima Tamukaemachi, Kumamoto 862-0965, Japan
e-mail: togoto{at}bronze.ocn.ne.jp

Background. Advanced age is associated with increased systemic atherosclerosis and is a consistent neurologic risk factor after coronary artery bypass grafting (CABG).

Methods. We studied prospectively whether varying degrees of a total atherosclerotic score derived from the brain, carotid arteries, and ascending aorta predicted postoperative neuropsychologic (NP) dysfunction and stroke in 177 elderly patients (>= 60 years) undergoing CABG.

Results. Group L (low total atherosclerotic score) had rates of NP dysfunction of 25% and 4%, group I (intermediate) had rates of 33% and 22%, and group H (high) had rates of 79% and 43% on postoperative days 1 and 7, respectively (p < 0.001). The incidence of stroke was higher in group H (14.3%) than in groups I and L (7.8% and 0.9%; p = 0.013). Stepwise logistic regression analysis demonstrated the significant predictors of NP dysfunction on postoperative day 7 to be total atherosclerotic score, peripheral vascular disease, and diabetes mellitus, and those of stroke to be total atherosclerotic score, peripheral vascular disease, and hyperlipidemia.

Conclusions. Perioperative evaluation of craniocervical and aortic atherosclerosis is useful to identify a high-risk patient at postoperative NP dysfunction and stroke after CABG.




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