一位護理師評估疑似左側心臟衰竭病人，何項臨床徵象最具代表性？

左側心臟衰竭（Left-sided heart failure）的核心病理在於左心室功能不全，導致心輸出量下降，血液無法有效泵出，進而逆流至肺靜脈系統。肺部微血管壓力隨之升高，液體滲漏至肺泡間隙造成肺水腫（Pulmonary edema），聽診即可發現濕囉音（Crackles）。這屬於呼吸系統的代償失調，是左側心衰竭最直接且具代表性的臨床徵象。其他選項（周邊水腫、頸靜脈怒張、肝腫大）多與右側心臟衰竭導致的體循環淤血有關。

Left-sided heart failure results in pulmonary congestion because the left ventricle cannot effectively pump blood forward, causing fluid to back up into the lungs. This leads to crackles upon auscultation due to fluid in the alveoli. Signs like peripheral edema, jugular venous distention, and hepatomegaly are characteristic of right-sided heart failure, which affects systemic circulation.