This study focuses on the clinical features and short-term prognosis of decompensated liver cirrhosis complicated with diastolic heart dysfunction (i.e., cirrhotic cardiomyopathy, CCM), which has important clinical significance. Firstly, the study clarifies that the incidence of heart dysfunction in this population reaches 37.2%, significantly higher than that in compensated patients, indicating that disease progression is closely related to heart function damage. Secondly, through multivariate analysis, it is found that age, NT-proBNP level, and mild to moderate ascites are independent predictive factors for CCM, providing practical indicators for early identification of high-risk patients. In addition, although the re-admission rate in patients with diastolic dysfunction is slightly higher, there is no significant difference in 90-day mortality, suggesting that a comprehensive assessment of prognosis is needed in complex pathological conditions. The study also emphasizes the importance of routine electrocardiogram and echocardiography screening and suggests that attention should be paid to the dynamic changes of NT-proBNP to guide treatment. Overall, the study improves the cognitive understanding of the clinical phenotype of CCM, optimizes the risk stratification model, and has realistic guiding value for improving patient management strategies and prognosis.