The Telltale Heartbeat : Heart-Rate Monitors are Taking New Shapes

The pulse rate has long been considered a basic and essential window on a person's general physical condition. A racing heart could mean a person is at risk for a heart attack or, conversely, simply stressed, excited, or exercising. An erratic heartbeat could be a sign of a thyroid condition or, rather, just an indication that a person has indulged in one too many cups of coffee that morning. A slow pulse, on the other hand, could be a sign of a serious electrical problem within the organ or suggest, to the contrary, that a heart is as strong as an ox.