Amazon.com description: Product Description: The updated third edition of BASIC DYSRHYTHMIAS continues to build on the qualities that made previous editions of the book so well received by ECG students and practitioners. The book has been redesigned and restructured to complement the order in which students learn specific skills: ECG components are presented first, followed by information on how to interpret ECGs to arrive at a diagnosis. More complex material follows basic skills, with advanced sections at the end. Packaged with the FREE Heart Rate Ruler and FREE Pocket Guide, this edition comes loaded with extras designed to enhance student learning!