A number of changes in electrocardiogram may develop in a patient with acute subarachnoid hemorrhage.


ECG Feature


ST wave

depression or elevation

T wave

wide, prominent, inverted

QTc interval


heart rate

sinus bradycardia


The ST and T wave changes may be misdiagnosed as an acute myocardial infarction.


Risk factors for severe prolongation of the QTc interval (Fukui et al):

(1) female gender

(2) hypokalemia < 3.5 mmol/L


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