There are two common methods to monitor a heart rate in a wearable device, but it is important to understand the limitations of each, says Mark Patrick. Heart rate measurement is no longer confined to ...

Effects of pressure and temperature on the electrocardiogram (EKG) and heart rate of crabs from the Galapagos deep-sea (2500 meters) hydrothermal vents were studied. Vent crabs require high ...

Measuring an individual’s heart rate appears to produce closely related results when the measurements are taken by an electrocardiogram or captured by photoplethysmography using a device such as a ...