SMART Watch Facilitated Early Discharge in Patients Undergoing Transcatheter Aortic Valve Replacement

Inclusion Criteria: * At least 18 years old; * Be willing and able to provide informed consent to participate in the study; * Not share HUAWEI Watch, HUAWEI phone with anyone else; * Patient has severe aortic stenosis with echocardiographically derived criteria: mean gradient \> 40mmHg or maximum velocity greater than 4.0 m/s or an initial aortic valve area of \< 1.0 cm2; * Patient who undergoing elective transfemoral transcatheter aortic valve replacement. Exclusion Criteria: * Severe complications of TAVR, such as death, and conversion to SAVR; * Life expectancy is less than 12 months due to non-heart disease (such as cancer, chronic liver disease, chronic kidney disease, or chronic end-stage lung disease, etc.); * Severe dementia (cannot sign research informed consent, cannot take care of themselves or complete the study visit); * The investigator believes that the patient is not suitable to participate in the study or complete the follow-up prescribed by the protocol from other medical, social and psychological aspects; * The patient is currently participating in another randomized study.