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The cardiopulmonary exercise test (CPET) is instrumental in determining the prognosis of patients with HF. This multicentre study will validate whether aggregate biometric data from the Apple Watch combined with demographic, cardiac, and biomarker testing can improve our ability to predict heart failure outcomes among a diverse outpatient HF population.",[119,120,121,122,123],"Heart Failure","Heart Failure - NYHA II - IV","Heart Failure Patients","Cardiopulmonary Exercise Test","Apple Watch",[123,125,119,126,127,128,129],"CPET","Artificial Intelligence","Wearable Technology","Wearable","Remote monitoring","NOT_YET_RECRUITING","2026-02-25",{"date":133,"type":134},"2026-03-04","ACTUAL",{"date":136,"type":114},"2026-03-16",{"date":138,"type":114},"2029-09",{"name":5,"class":6},3]