Mechanistic Study of Yiqi Wenyang Formula Combined with Standard Therapy for Reducing Short-Term Readmission by Alleviating "Dampness" Burden and Regulating sST2/Galectin-3 in Acute Heart Failure

INTERVENTION: Experimental group (Yi Qi Nuan Yang formula + basic treatment):On the basis of common basic treatment (evidence‐based drug therapy, including diuresis, vasodilation, improving cardiac function, and regulating neuroendocrine, etc.), the Qi‐invigorating and Yang‐nourishing formula was added, one dose per day for consecutive 2 weeks.;Control group (basic treatment):Only common basic treatment (drug therapy guided by guidelines, including diuretics, vasodilation, improvement of cardiac function, and regulation of neuroendocrine system, etc.) is accepted. Research‐use Qi‐invigorating and yang‐warming formulas are not used, and no additional use of Chinese herbal compound formulations with explicit qi‐invigorating, yang‐warming, and diuretic effects is allowed during hospitalization.; CONDITION: BD11.2 Heart Failure PRIMARY OUTCOME: 90‐day heart failure readmission rate; SECONDARY OUTCOME: Dampness Load Score;Serum sST2;Galectin‐3;NT‐proBNP;NYHA cardiac function classification; INCLUSION CRITERIA: 1.Aged 18–85 years. 2.Diagnosed with acute heart failure, including acute decompensation of chronic heart failure, and requiring hospitalization for the current episode of decompensated heart failure. 3.Meeting the Traditional Chinese Medicine syndrome criteria for either qi deficiency or yang deficiency, together with the diagnostic criteria for dampness syndrome. 4.Able to take the study Chinese medicine orally during hospitalization and comply with all in‐hospital assessments and sample collection. 5.Having provided written informed consent and being willing and able to complete the 90‐day post‐discharge follow‐up.