The 30-Second Test That Could Save Your Heart Cardiac problems sometimes progress quietly, but a simple test may reveal warning signs before trouble starts. 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, though https://www.tumblr.com/dramitpatil/799125220035313664/the-30-second-test-that-could-save-your-heart?source=share