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7月熱傷害就醫1188人次!大量出汗→血變濃稠 醫示警高溫心肌梗塞

ETtoday
2024/08/01 | 2分鐘閱讀

記者洪巧藍/台北報導

今年好熱!衛福部統計整個7月因為熱傷害就醫高達1188人次,明顯高過去年。醫師示警,高溫環境會對心血管造成威脅,因為人體大量出汗,如果未能及時補充水分,會導致身體脫水,增加血液的濃稠度,這將會增加心臟負擔,增加心肌梗塞和中風的機率,提醒民眾多注意水分補充,防範極端高溫對健康的影響。

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根據衛福部統計,今年7月總計有1188人次因為熱傷害就醫,明顯超過去年7月的887人次。台南市立醫院心臟內科醫師吳柏青指出,在極端高溫下,人體若無法有效散熱,體溫會迅速升高,導致熱衰竭及熱中暑;熱中暑是一種急性且危及生命的情況,會導致心臟、腦部及其他器官功能受損。

吳柏青指出,高溫環境下,人體容易大量出汗,如果未能及時補充水分,會導致身體脫水,使血液濃縮,增加血液的濃稠度,加大心臟輸出的難度,不僅增加心臟負擔,還會提高血栓風險,進而增加心肌梗塞和中風的機率。且流汗時,人體不僅失去水分,還會流失鈉、鉀、鎂等重要電解質,這些電解質可維持心臟正常功能,嚴重失衡會引發心律不整問題。

此外,在極端高溫下,心臟需更加努力工作以加速血液流向皮膚表面進行散熱,這將增加心臟負擔,讓血管擴張,導致血壓變動,對於老年人或本身低血壓的人群,可能會引發頭暈、昏厥甚至腎臟衰竭等症狀。

要預防高溫對心臟的傷害,吳柏青強調,一定要保持足夠的水分攝取,定時補充水分以避免脫水;穿著輕便、透氣的衣物幫助身體散熱;儘量待在陰涼處或空調環境中,尤其是老年人和冠狀動脈疾病、高血壓或心律異常等心血管疾病患者,要經常監測體溫變化。

吳柏青提醒,若出現心跳加速、頭暈、胸口悶痛或意識不清等症狀,務必迅速離開高溫的環境、鬆脫衣物、用水擦拭身體等設法降低體溫、提供添加少許鹽的冷開水或電解質飲料,並立即就醫。

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