Heart data unlocks sleep secrets
We know that quality sleep is as essential to survival as food and water. Yet, despite spending a third of our lives in slumber, it largely remains a scientific mystery.
Not that experts haven’t tried.
Sleep analysis, also known as polysomnography, is used to diagnose sleep disorders by recording multiple types of data, including brain (electroencephalogram or EEG) and heart (electrocardiogram or ECG). Typically, patients are hooked up to dozens of sensors and wires in a clinic, tracking brain, ...










