Cerebrovascular Complications after Coronary Bypass Surgery

Jin, Ung; Kim, Young Doo; Yoon, Jeong Seob; Kim, Chi Kyung

Abstract

BACKGROUND: Cerebrovascular accidents after coronary bypass surgery(CBS) are serious and responsible about 10% for postoperative mortality. Recently, the rate of cerebrovascular complication after CBS has increased with increasing number of the operations for high risk patients with old age, hypertension, diabetics and etc. This study was intended to identify the risk factors of cerebrovascular accident after CBS by reviewing the medical records of the patients who underwent CBS. MATERIALS AND METHOD: We reviewed the medical records and statistically analyzed the data of 185 patients who underwent CBS between March 1991 and July 1999. RESULT: The rate of cerebrovascular complication was 7.5%(14 patients) of which there were 5 deaths. Total number of postoperative death was 11 during the same period, and 45.5% of postoperative deaths were associated with cerebrovascular complication. Postoperative arrhythmia(p=0.0064), history of previous CVA(p=0.0090), bypass time(p= 0.0181), atherosclerosis of aorta(p=0.03575) and diabetics(p=0.0452) were statistically related with the development of postoperative cerebrovascular complication. Two patients underwent carotid endarterectomy concomitantly with CBS, neither of them developed cerebrovascular complications. The 3 patients over 75 years did not develop cerebrovascular complication after CBS.
CONCLUSION
Risk factors associated with the development of postoperative cerebrovascular complication after CBS were postoperative arrhythmia, history of previous stroke, bypass time, atherosclerosis of aorta and diabetics.