Firefighters - take note!
Keep an eye out for any symptoms which could be related, and make sure you seek help - it could be more serious than you think.
Nineteen non-smoking, healthy firefighters were randomly selected to take part in the study. They took part in exercises, including a mock rescue from a two-storey structure, which exposed them to extremely high temperatures, while wearing heart monitors. They found their core body temperatures remained high for three to four hours following exposure to the fire. They also found their blood became stickier and was about 66% more likely to form potentially harmful clots. Their blood vessels also failed to relax in response to medication. The research team believe that the increase in clotting was caused by a combination of fluid loss due to sweating and an inflammatory response to the fire heat, which resulted in the blood becoming more concentrated, so more likely to clot. The researchers also found the exposure to fire caused minor injury to the heart muscles.