We have located links that may give you full text access.
JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
Electrocardiographic changes predict angiographic vasospasm after aneurysmal subarachnoid hemorrhage.
Stroke; a Journal of Cerebral Circulation 2012 August
BACKGROUND AND PURPOSE: Early identification of patients at risk of angiographic vasospasm after aneurysmal subarachnoid hemorrhage (SAH) may mitigate its sequelae. One mechanism that may contribute to angiographic vasospasm is increased central sympathetic activity, which is also thought to cause electrocardiographic (ECG) changes after SAH. Here, we perform the first study to determine the association between ECG changes and angiographic vasospasm after SAH.
METHODS: Exploratory analysis was performed on 413 patients from CONSCIOUS-1, a prospective randomized trial of clazosentan for the prevention of angiographic vasospasm. ECGs were obtained within 24 hours of aneurysm rupture and during the vasospasm risk period. Angiographic vasospasm was assessed using catheter angiography at baseline and 7 to 11 days after SAH. Multivariate logistic regression was used to identify significant associations.
RESULTS: The most prevalent finding on ECG both immediately following SAH and during the vasospasm risk period was QT prolongation (42% and 25%, respectively). A prolonged QT interval and tachycardia on the baseline ECG were associated with angiographic vasospasm (OR, 1.86; 95% CI, 1.00-3.45; and OR, 10.83; 95% CI, 1.17-100.50, respectively). QT prolongation on ECG during the vasospasm risk period was also associated with angiographic vasospasm (OR, 3.53; 95% CI, 1.67-7.39). No ECG findings were associated with delayed ischemic neurological deficit, but tachycardia and ST changes were associated with worse clinical outcome.
CONCLUSIONS: QT prolongation and tachycardia on ECG were independently associated with angiographic vasospasm after aneurysmal SAH on multivariate analysis.
CLINICAL TRIAL REGISTRATION: URL: https://clinicaltrials.gov. Unique Identifier: NCT00111085.
METHODS: Exploratory analysis was performed on 413 patients from CONSCIOUS-1, a prospective randomized trial of clazosentan for the prevention of angiographic vasospasm. ECGs were obtained within 24 hours of aneurysm rupture and during the vasospasm risk period. Angiographic vasospasm was assessed using catheter angiography at baseline and 7 to 11 days after SAH. Multivariate logistic regression was used to identify significant associations.
RESULTS: The most prevalent finding on ECG both immediately following SAH and during the vasospasm risk period was QT prolongation (42% and 25%, respectively). A prolonged QT interval and tachycardia on the baseline ECG were associated with angiographic vasospasm (OR, 1.86; 95% CI, 1.00-3.45; and OR, 10.83; 95% CI, 1.17-100.50, respectively). QT prolongation on ECG during the vasospasm risk period was also associated with angiographic vasospasm (OR, 3.53; 95% CI, 1.67-7.39). No ECG findings were associated with delayed ischemic neurological deficit, but tachycardia and ST changes were associated with worse clinical outcome.
CONCLUSIONS: QT prolongation and tachycardia on ECG were independently associated with angiographic vasospasm after aneurysmal SAH on multivariate analysis.
CLINICAL TRIAL REGISTRATION: URL: https://clinicaltrials.gov. Unique Identifier: NCT00111085.
Full text links
Related Resources
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app