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• W2017406684 abstract "The relationship between early hypertension following carotid endarterectomy, and intraoperative cerebral ischemia was investigated. Two measures of the adequacy of collateral cerebral circulation during carotid clamping were used: collateral cerebral perfusion pressure (ΔP), and the ratio of collateral to ipsilateral cerebral vascular resistance (R/R). Change in blood pressure was measured by the ratio of mean early post to preendarterectomy pressure (P/P). Nitroprusside or nitroglycerin (NN) was used after endarterectomy to maintain systolic blood pressure < 160 mmHg. The mean values for NN (n = 26) and no NN (n = 81) groups were: ΔP = 30.0 and 40.2 mmHg (p < 0.001); R/R = 1.93 and 1.24 (p < 0.005); and P/P = 1.03 and 0.857 (p < 0.001 p by unpaired t test). Linear regression analysis of the two measures of cerebral perfusion with the ratio of post-to preoperative blood pressure gave correlation coefficients between 0.629 and 0.841 with a probability that the slope of the regression line > 0 of < 0.01. Low ΔP and high R/R correlate with early postcarotid endarterectomy hypertension. These results support the hypothesis that one determinant of early post endarterectomy hypertension is inadequate collateral cerebral circulation during carotid clamping. The relationship between early hypertension following carotid endarterectomy, and intraoperative cerebral ischemia was investigated. Two measures of the adequacy of collateral cerebral circulation during carotid clamping were used: collateral cerebral perfusion pressure (ΔP), and the ratio of collateral to ipsilateral cerebral vascular resistance (R/R). Change in blood pressure was measured by the ratio of mean early post to preendarterectomy pressure (P/P). Nitroprusside or nitroglycerin (NN) was used after endarterectomy to maintain systolic blood pressure < 160 mmHg. The mean values for NN (n = 26) and no NN (n = 81) groups were: ΔP = 30.0 and 40.2 mmHg (p < 0.001); R/R = 1.93 and 1.24 (p < 0.005); and P/P = 1.03 and 0.857 (p < 0.001 p by unpaired t test). Linear regression analysis of the two measures of cerebral perfusion with the ratio of post-to preoperative blood pressure gave correlation coefficients between 0.629 and 0.841 with a probability that the slope of the regression line > 0 of < 0.01. Low ΔP and high R/R correlate with early postcarotid endarterectomy hypertension. These results support the hypothesis that one determinant of early post endarterectomy hypertension is inadequate collateral cerebral circulation during carotid clamping." @default.
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• W2017406684 date "1988-04-01" @default.
• W2017406684 modified "2023-09-23" @default.
• W2017406684 title "The Relationship of Early Hypertension Following Carotid Endarterectomy to Intraoperative Cerebral Ischemia" @default.
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• W2017406684 doi "https://doi.org/10.1016/s0890-5096(06)60791-7" @default.
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