A Quick 30-Second Test That Might Save Your Life 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 30-Second Heart Test isn’t a diagnosis, but https://www.tumblr.com/dramitpatil/799125220035313664/the-30-second-test-that-could-save-your-heart?source=share