This study looked at adults in intensive care units who had spontaneous brain bleeds. Researchers tracked how their blood pressure changed over the first seven days. They grouped patients into two clusters based on these changes: one group had a rebound in blood pressure, and the other had a rapid drop. The main focus was on whether these patterns affected kidney health.
The analysis found that patients in the rebound blood pressure group had significantly higher odds of developing acute kidney injury compared to the rapid-drop group. Additionally, higher doses of the blood pressure medication nicardipine were associated with an increased risk of kidney injury. However, the study did not find significant links between these blood pressure patterns and brain swelling, neurological function, or death within one year.
The researchers noted that the real-world effects of keeping blood pressure very low for long periods are not fully understood. While the study supports being cautious about aggressive blood pressure targets, it does not prove that one pattern causes kidney failure. More research is needed to clarify these risks before changing standard care.