OBJECTIVE: We investigated the cerebral perfusion status during on-pump or off-pump coronary artery bypass grafting (CABG). METHODS: We monitored somatosensory evoked potential (SEP) and regional cerebral oxygen saturation (rSO2) as parameters of cerebral perfusion in an on-pump group (n=10) and an off-pump group (n=16). The percent changes from control values were calculated before, during, and after aortic clamping, and after weaning from cardiopulmonary bypass, in the on-pump group. In the off-pump group, these were calculated before, during, and after heart displacement for distal anastomosis. RESULTS: In the on-pump group, the amplitudes of the SEP were significantly enhanced during and after aortic cross-clamping and were associated with a significant decrease in rSO2. Latency was prolonged immediately after aortic cross-clamping, but was shortened afterwards. There was little change in these parameters throughout the operation, in the off-pump group. CONCLUSIONS: Cerebral perfusion remains stable during off-pump CABG. The etiology of a simultaneous increase in SEP amplitude and decrease in rSO2 during the rewarming period in the on-pump group requires further investigation.
OBJECTIVE: We investigated the cerebral perfusion status during on-pump or off-pump coronary artery bypass grafting (CABG). METHODS: We monitored somatosensory evoked potential (SEP) and regional cerebral oxygen saturation (rSO2) as parameters of cerebral perfusion in an on-pump group (n=10) and an off-pump group (n=16). The percent changes from control values were calculated before, during, and after aortic clamping, and after weaning from cardiopulmonary bypass, in the on-pump group. In the off-pump group, these were calculated before, during, and after heart displacement for distal anastomosis. RESULTS: In the on-pump group, the amplitudes of the SEP were significantly enhanced during and after aortic cross-clamping and were associated with a significant decrease in rSO2. Latency was prolonged immediately after aortic cross-clamping, but was shortened afterwards. There was little change in these parameters throughout the operation, in the off-pump group. CONCLUSIONS: Cerebral perfusion remains stable during off-pump CABG. The etiology of a simultaneous increase in SEP amplitude and decrease in rSO2 during the rewarming period in the on-pump group requires further investigation.
Authors: D van Dijk; A P Nierich; E W Jansen; H M Nathoe; W J Suyker; J C Diephuis; W J van Boven; C Borst; E Buskens; D E Grobbee; E O Robles De Medina; P P de Jaegere Journal: Circulation Date: 2001-10-09 Impact factor: 29.690
Authors: Jeffrey D Lee; Shay J Lee; William T Tsushima; Hideko Yamauchi; William T Lau; Jordan Popper; Alan Stein; David Johnson; David Lee; Helen Petrovitch; Collin R Dang Journal: Ann Thorac Surg Date: 2003-07 Impact factor: 4.330