Hey are you looking for neurologist near Mylapore? When is surgery indicated in a stroke? Stroke especially hemispherical strokes evolve over 24 to 48 hours Hence the general conscious level is likely to deteriorate in 2 days following the stroke This occurs because already formed infarct in the brain enlarges in size or there can be bleeding inside the infarct Watching and closely observing the conscious level is very much necessary in the icu Early surgical intervention called as hemicraniectomy can be life saving