<p>Darren Ali was a healthy 45 year old when he had a massive heart attack that could have killed him. He wants everyone to learn from his experience and get tested for the cholesterol Lipoprotein(a) because it could save their lives. And we'll hear from a doctor about how this cholesterol can cause unexpected heart attacks among younger and otherwise healthy people -- and why new guidance recommends getting tested. </p><p><br></p>