Whether it's apps that tell us how far we've walked or run, or how many calories are in our meals, today's technology is helping us keep tabs on how healthy we've become – or how much we've fallen behind.  One such app, PulsePoint, can be used to help save a life. "PulsePoint is a mobile application that alerts citizens who are CPR-trained of nearby cardiac arrests so they can get CPR started while the crews are still en route," Richard Price, President of the PulsePoint Foundation, said in a report for CNBC's Innovation Cities.  (Read more: Avoid jet lag: Getting a workout at the airport)  Using cloud technology, the app connects with local emergency communication centers of emergency services signed up to the program. When a cardiac arrest takes place in a nearby public space, subscribers in areas covered by the app – which is currently available in over 350 communities across 14 states in the U.S. – are notified with a push notification and an alert tone on their phone, followed by a map showing the precise location of the emergency.  Sudden Cardiac arrests account for roughly 325,000 deaths per year in the U.S. Today, 75,000 people have PulsePoint on their phones, although it is impossible to verify how many users are CPR trained.  (Read more: Secret gardens for city spaces)  A former fire chief in California, the inspiration for the app came to Price in an unusual place. "The original idea came from an incident where I was having lunch in a deli and was surprised by a crew arriving to a cardiac arrest that was happening right next door that I wasn't aware of," Price said. "We knew that all that time the crew was travelling to the scene we could have CPR in progress sooner," he added.
How is today's technology warning us of potential health risks, and helping to save lives in critical emergencies?