寒流來襲，許多人喜歡相約吃一鍋熱騰騰的火鍋暖身，從舌尖一路暖到全身，的確讓人感到舒暢。不過，醫師提醒，看似平凡的禦寒行為，若忽略一個細節，反而可能讓身體承受過大的刺激，對心血管造成壓力。心臟專科醫師指出，人在溫暖環境中用餐，身體血管多處於較為放鬆的狀態，特別是吃了熱食、喝了酒之後，血流速度加快，體感溫度上升。此時若立刻走到戶外，瞬間接觸寒冷空氣，血管會在短時間內劇烈收縮，對心臟與血管形成強烈衝擊。臨床上就曾遇過年紀不大的患者，在寒流期間吃火鍋配酒，身體還處於「熱呼呼」的狀態下，未多加保暖便離開餐廳，一接觸低溫便感到不適，隨即倒地，後續檢查發現與急性心臟問題有關。醫師強調，溫差變化過快，加上酒精影響血管調節能力，是誘發意外的重要因素之一。除了突如其來的胸部不適，醫師也提醒，心臟相關問題不一定只表現為明顯胸痛。有些人可能出現胸悶、喘不過氣，也有人感覺到腹部、下巴、頸部、肩背或手臂不適，甚至只是全身乏力、發麻，都值得提高警覺，尤其在天氣寒冷時更不能輕忽。專家也整理出冬季特別需要留意的時刻，往往都與「溫差」有關，例如早上剛離開溫暖被窩、從開著暖氣的室內走到戶外，或是洗完熱水澡、身體還沒回溫就接

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