# The bleeding weather: association of environmental changes with intracranial aneurysms’ rupture

## TL;DR

This study found that aneurysm ruptures are more common on Mondays and are linked to higher dust levels in the air.

## Contribution

The first study to associate aSAH severity with atmospheric dust levels and to report increased ruptures on Mondays.

## Key findings

- Aneurysm ruptures occurred more frequently on Mondays than on Fridays.
- Higher atmospheric dust levels were associated with more severe aSAH cases.
- Environmental factors like temperature and humidity did not significantly affect aSAH prevalence or severity.

## Abstract

Various studies have attempted to link aneurysmal subarachnoid hemorrhage (aSAH) with environmental factors, yielding inconsistent results.

We retrospectively collected clinical and demographic data from all patients who presented to our hospital with aSAH between January 1st, 2015, and December 31st, 2021.

Our study found a significant variation in the occurrence of aneurysm ruptures based on the day of the week, with more ruptures occurring on Mondays compared to Fridays. Additionally, we discovered that the amount of dust in the air prior to the ictus influenced the severity of the aSAH. In contrast, other environmental parameters such as atmospheric pressure, temperature, humidity, rain, wind speed, and cloud cover did not significantly impact the prevalence or severity of aSAH.

To our knowledge, this is the first study to associate the severity of aSAH with atmospheric dust levels. Another key finding is the increased incidence of aneurysm ruptures on Mondays compared to Fridays.