Relation of ECG changes to neurological outcome in patients with aneurysmal subarachnoid hemorrhage.
BACKGROUND
Electrocardiographic (ECG) alterations occurring during the course of subarachnoid hemorrhage (SAH) have been described frequently, but the incidence, patterns, and prognostic significance are not well defined. This study was designed to investigate these features.


METHODS
All patients admitted to a 31-bed department of intensive care between 1993 and 2000 with acute aneurysmal SAH documented by cerebral angiography or autopsy were included. Patient charts were reviewed retrospectively, and an observer blinded to the patients' clinical course and outcome reviewed the ECGs. In-hospital mortality and outcome as assessed by the Glasgow outcome score were noted.


RESULTS
Of 159 patients (49.6 years [range: 20-75]) with acute SAH, 106 (66.7%) had abnormal ECGs (classified by an observer blinded to the patients' clinical course and outcome. Conduction abnormalities were present in 7.5%. Arrhythmias occurred in 30.2%. By univariate analysis, the presence of ST depression was related to outcome as assessed by the Glasgow Outcome Scale (GOS) (15% poor outcome [GOS 4-5] vs. 1% good outcome [GOS 1-3], p<0.05). However, by multivariate analysis, none of the ECG alterations was related to outcome. ST depression was related to the APACHE II score, Hunt and Hess scale, and the WFNS score. ECG abnormalities were not related to the development of vasospasm or increased intracranial pressure.


CONCLUSIONS
In patients with acute aneurysmal SAH, repolarization abnormalities are the commonest ECG alterations, and ST depression is more common in patients with poor outcome. However, ECG alterations are not independently related to outcome.
Sakr
Yasser L
YL
Deparment of Intensive Care, Erasme University Hospital, Free University of Brussels, Route de Lennik, 808, B-1070 Brussels, Belgium.
Lim
Noelle
N
Amaral
André C K B
AC
Ghosn
Issam
I
Carvalho
Frederico B
FB
Renard
Marc
M
Vincent
Jean Louis
JL
D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009422:Nervous System Diseases / Q000209:etiology*; D011237:Predictive Value of Tests; D011379:Prognosis; D012189:Retrospective Studies; D012720:Severity of Illness Index; D013345:Subarachnoid Hemorrhage / Q000150:complications / Q000503:physiopathology*