The Impact of Comprehensive Post Hospital Management Based on DHI on Cardiac Function in Patients With HF

Inclusion Criteria: 1. Patients hospitalized for HF, NYHA classification II-IV upon admission 2. The patient's residence is within the urban area of each center, and ReDS™ technology can be performed at home or at the outpatient clinic 3. No difficulty using smartphones, with basic Chinese reading and writing skills 4. Accept the terms and conditions of the study and obtain informed consent from the subjects/their families Exclusion Criteria: 1. Age\<21 years old 2. Patients with height\<155 cm or\>190 cm, BMI\<22 kg/m2 or\>36 kg/m2, chest circumference\<80 cm or\>115 cm, and flail chest or rib fractures 3. History of pulmonary embolism 4. chronic renal failure（Scr \> 443umol/L） 5. History of heart transplantation or pacemaker implantation 6. Severe pulmonary hypertension 7. Suffering from end-stage chronic obstructive pulmonary disease, requiring home oxygen therapy 8. Massive pleural effusion 9. The subject is unable to complete the 6-minute walking test 10. Expected lifespan\<6 months 11. Researchers believe that participants are not suitable to participate in this trial (such as pregnancy, severe visual or hearing impairment, etc.) 12. Individuals who are unable to understand and/or comply with this research procedure (such as those who are addicted to alcohol, substance abuse, or have mental illnesses) 13. Currently participating in clinical trials of other devices or drugs 14. Researchers involved in the design and execution of this study