What is the relationship between hematoma expansion and early neurological deterioration?
The high rate of early neurological deterioration after ICH is related in part to active bleeding that may proceed for hours after symptom onset. Hematoma expansion tends to occur early after ICH and increases risk of poor functional outcome. Among patients undergoing head CT within 3 hours of ICH onset, 28% to 38% have hematoma expansion of greater than one third of the initial hematoma volume on follow-up CT.