Scary Warning Signs Pets Can Give YouSubscribe to Top 10s <a href="https://goo.gl/zvGBHeDescription:Charlie">https://goo.gl/zvGBHeDescription:Charlie</a> from Top 10s ...

But it's a little less scary if you know that it's really not that sudden. A new study found that about half of cardiac arrest patients had telltale warning signs for a month beforehand.