众所周知,肥胖是心血管疾病的独立危险因子,然而既往关于慢性收缩性心力衰竭(心衰)的研究却显示体重指数(BMI)与死亡率负相关,即所谓“肥胖与心衰的矛盾现象”。急性失代偿性心衰的病理生理机制与慢性心衰不同,BMI是否影响这类人群的死亡风险尚不可知,本研究即探讨BMI是否影响 It is well-known that obesity is an independent risk factor for cardiovascular disease. However, previous studies on chronic systolic heart failure (HF) have shown that the body mass index (BMI) is negatively correlated with mortality, the so-called “contradiction between obesity and heart failure” . The pathophysiology of acute decompensated heart failure and chronic heart failure is different, whether the impact of BMI on the risk of death in this population is not yet known, this study is to explore whether the impact of BMI