Which vital sign abnormality is noted in the client who collapsed from a heat-related issue?

In cases of heat-related illnesses, such as heat exhaustion or heat stroke, one of the common physiological responses to hyperthermia is a drop in blood pressure. As the body becomes overheated, it can lead to vasodilation—where blood vessels widen—resulting in pooling of blood and a decrease in venous return to the heart. This can culminate in low blood pressure, a critical indicator when assessing a patient who has collapsed due to heat exposure.

Additionally, the body attempts to compensate for the heat by increasing heart rate and respiratory rate, which often leads to a high heart rate and elevated respiratory rate. Hypothermia, on the other hand, would not be relevant in this context, as it refers to a dangerously low body temperature rather than a response to heat exposure. Understanding the interplay of these vital sign changes is crucial in managing heat-related illnesses effectively.