An elderly patient presented with sudden onset of headache and altered sensorium, is diagnosed to have Subarachnoid hemorrhage. What is the best investigation of choice in this case?
CT Scan
MRI Scan
Roentgenogram of Skull
Carotid Angiogram
(A) CT Scan # Subarachnoid hemorrhage (SAH) implies the presence of blood within the subarachnoid space from some pathologic process.> Initial study of choice is an urgent CT scan without contrast CT also can detect intracerebral hemorrhage, mass effect, and hydrocephalus. A falsely negative CT scan can result from severe anemia or small-volume SAH.> Cerebral angiography is performed once the SAH diagnosis is made.> This study assesses the following: Vascular anatomy Current bleeding site Presence of other aneurysms> Magnetic resonance imaging (MRI) is performed if no lesion is found on angiography.
Miscellaneous