I was detected to have a chronic lacunar infarct, left parietal periventricular white matter. please advise what it is and if it is fatal. ?

Sign of a stroke: Such a term implies there is evident of an old stroke (size matters) on the left side of the brain in ther deeper area beneath the surface. Periventrical lesions there are common for small strokes often associated with hypertension/diabetes - it obviously was not be fatal in itself, but the underlying disease must be managed medically. The effects may best be measured by neuropsych.