Stroke is defined as a "brain attack" that most often occurs when blood that brings oxygen to your brain stops flowing and brain cells die. And African Americans are more likely to experience stroke and/or die from it than any other racial group. Cardiologist Dr. Keith Newby talks about the causes, treatments, and preventive measures you can take to prevent a stroke. And we'll tell you how to spot the signs of stroke - using F.A.S.T. - face drooping, arm weakness, speech difficulty, and when it's time to call 911 - because stroke is an emergency!