A man in US claimed an Apple Watch app notification saved his life after it detected signs and symptoms of a  life-threatening blood clot in their lungs and alerted him to get medical  attention.

New York resident James Green, 28, got a stern reminder from  the HeartWatch app, which monitors ones beats per minute constantly  every day and notifies users when their resting heart rate rises above or dips below a certain threshold, the Telegraph reported. 

“Never  thought a stupid lil wrist computer I aquired 2 yrs ago would save  gaming. Saw my heart rate rise, turned into a pulmonary embolism (a blood clot within the lungs),” Green said in a very tweet.

The app notified him that his heartbeat was continuously above his usual heartbeat of 54 bpm.

“That as well as other symptoms I became having was enough data I wanted to act  in it, and realise it had not been a panic attack (since I have severe generalised anxiety), it has been nearly anything,” Green said.

Later, a CT scan inside the hospital demonstrated that Green suffered a blood clot in his lungs. His doctor said the clot might have been fatal if Green had waited longer to have medical help.

Because some fitness  trackers and smartwatches include heart monitor watches, the devices can  potentially alert customers to certain health issues that can cause changes in heart rate. 

However, you need to note that many of  the unit may not be approved. In order that they cannot be useful to diagnose cardiovascular conditions, experts suggest.