" According to the Heart Rhythm Society, more than 350,000 deaths occur each year from Sudden Cardiac Arrest (SCA). To decrease the death toll from SCA, it is important to understand what SCA is, what the warning signs are, and how to respond to an SCA event. People often use the term “heart attack” interchangeably with SCA, but they are NOT the same thing! What is the difference? A heart attack occurs when a blocked ...