Medical News Today -- Since Congress declared October “National Sudden Cardiac Arrest Awareness Month” one year ago, more than 250,000 Americans have suffered SCA. For too many, the underlying cause was Hypertrophic Cardiomyopathy (HCM), an inherited disease that affects one out of 500 Americans. What makes it all the more troubling is that early diagnosis of HCM through simple and inexpensive screening can reduce the risk of sudden cardiac death.