气温突破33℃，就应警惕“热中风”！

Core Viewpoint - The article emphasizes that summer is not a safe season for cerebrovascular diseases, highlighting the increased risk of strokes due to high temperatures and temperature fluctuations caused by air conditioning [1][2]. Group 1: Cerebrovascular Disease Risks - The incidence of cerebrovascular diseases, particularly ischemic strokes, significantly increases when temperatures exceed 33°C [1]. - The temperature difference between air-conditioned environments and outdoor heat can lead to severe vascular stress, particularly when the indoor-outdoor temperature difference exceeds 7°C [1]. Group 2: Mechanisms of Risk - High temperatures can lead to dehydration, reducing blood volume and increasing blood viscosity, which heightens the risk of strokes [2]. - Alternating between extreme temperatures can cause significant fluctuations in blood pressure, increasing the likelihood of both hemorrhagic and ischemic strokes [2]. Group 3: High-Risk Populations - High-risk groups for strokes include individuals with pre-existing cerebrovascular conditions, elderly individuals with vascular hardening, and younger individuals with unhealthy lifestyles [2]. Group 4: Prevention and Response - Recognizing risk factors is crucial for stroke prevention, including adequate hydration, regular sleep patterns, and avoiding extreme temperature changes [2]. - In the event of a stroke, immediate action is critical, as the first 4.5 to 6 hours are vital for effective treatment to minimize brain damage [2].