Ted Rogers Understanding of Exacerbations in Heart Failure 2: Monitor

Heart Failure (HF) is a complex disease associated with the highest burden of cost to the healthcare system. 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.

Inclusion Criteria: * broad age range (\> 18 years of age) * NT-proBNP \> 400 or 1000 if in AF * Within 3 months post discharge from HF hospitalization/ HF ED visit/ HF rapid clinic visit with intensification of diuretic therapy * NYHA functional class I-IV, heart failure with reduced and preserved ejection fraction * Literacy in English * Patient provided informed consent Exclusion Criteria: * Unable to perform a CPET based on the standard protocol * End stage renal disease requiring dialysis * Living with LVAD * MRP deems patient unfit for the study * Post heart transplant