Doctors are helping New Yorkers learn the difference between cardiac arrest and heart attack this February, National Heart Month. While the terms are often used interchangeably, there are important differences that could help people save a life. Comments from Dr. Srihari Naidu (SHRI-har-ee NY-doh), president, New York Chapter of the American College of Cardiology; and Dr. Ravi Johar (YO-har), chief medical officer at UnitedHealthcare.