Rural china tests smart wearables to stop heart failure before it starts

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1\. The village clinics need to be willing and able to provide integrated care to their patients with atrial fibrillation; 2. The village doctors from one village clinic serves all AF patients from 3-5 nearby villages; 3. The village doctors are trained to have a fundamental understanding of telemedicine; 4. Patients are eligible for participation if 1)they aged 65-80 years. 2)Availability of an electrocardiogram confirming atrial fibrillation, or an official diagnosis certificate of atrial fibrillation issued by a specialist. 3)Receiving healthcare management from a primary medical institution near the place of residence. 4)Able to understand and sign the informed consent form. Exclusion Criteria: 1. A definite history of heart failure, or confirmed cardiac dysfunction or heart failure based on echocardiography and/or NT-proBNP screening. Diagnostic criteria include typical heart failure symptoms or signs with reduced left ventricular ejection fraction (HFrEF, LVEF \<40%), mildly reduced left ventricular ejection fraction (HFmrEF, LVEF 40-49%), or preserved left ventricular ejection fraction with elevated NT-proBNP and structural heart disease evidence (HFpEF, LVEF ≥50%, with at least one of the following: LAVI \>40 mL/m², E/e' ≥15, or TRV \>2.8 m/s). 2. Expected survival of less than 12 months. 3. Severe renal insufficiency, defined as creatinine clearance \<30 mL/min, or currently receiving dialysis treatment. 4. Cardiac dysfunction caused by reversible secondary causes, including hyperthyroid heart disease, anemic heart disease, or uncorrected congenital heart disease. 5. Indication for pacemaker implantation but without pacemaker placement. 6. Chronic obstructive pulmonary disease complicated by type II respiratory failure. 7. Special populations, such as patients with mental illness.