On the contrary, unless you've been told what it is you're feeling, it can be easily ignored. To your peril.Using a device (A-watch) to tell you when you're heart is skipping beats is like having a device to tell you when you're getting cramps. Every missed heart beat is is easily felt and unpleasant enough as it is without some damn device reminding you of it.
Sure, once you know what it is - and understand the seriousness - then it's just damned frightening.
Watch could save lives. Bring it on.