What is considered a life-threatening sign after in-water recompression?

Type II symptoms are considered life-threatening after in-water recompression due to their severe nature, which can indicate a more critical state of decompression sickness. These symptoms can include neurological issues such as confusion, loss of consciousness, or other central nervous system dysfunctions. The presence of Type II symptoms suggests that the diver may be facing significant and acute physiological distress that could lead to lasting damage or fatality if not addressed promptly.

In contrast, Type I symptoms tend to be less severe and primarily involve joint pain or skin rashes, which, while uncomfortable, are generally not immediately life-threatening. Reduced heart rate could indicate a physiological response but isn't necessarily a direct sign of critical condition after recompression. Improved consciousness suggests recovery and is a positive sign, indicating that the diver is likely responding well to treatment. Therefore, when assessing the urgency and threat level of symptoms following recompression, Type II symptoms stand out as the most critical.