Observed arrival · 2026-09-16
CARDIAX Wants to Put Cardiac Output on Your Wrist
A research prototype proposes measuring stroke volume and cardiac output non-invasively through a wrist-worn thermal and PPG sensor.
Field notes
CARDIAX describes a wrist-based measurement sequence: apply a controlled thermal pulse, monitor the cooling response, and fuse it with PPG data to estimate hemodynamic output. The page attributes the approach to thermal-dilution principles and cites a Balkan Medical Journal publication, a 142-person study, and an R=0.87 correlation claim. It also lists BLE transfer, a proposed seven-day battery, and a low-profile prototype, but the extract does not establish independent validation or general availability.
Observed signals
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