The 30-Second Test That Could Save Your Heart Cardiac Problems sometimes progress quietly, but this easy 30-second self-assessment can give you a lifesaving warning. In simple terms, it’s a quick way to see how your heart rate reacts to mild effort. This home screening doesn’t replace a doctor’s exam, but https://share.evernote.com/note/4768a240-fc70-380c-4d35-0ea36c97e5b0