Basic concepts of EKG- A Simplified Approach 2nd Edition is an attempt to make the complex nature of EKG analysis to simple and logical endeavor. This edition of the book evolved from the encouragement and feedback that we received for our earlier edition. A 'rationalized approach with simplified analogy' method is again used throughout this book. We strongly believe in the simple to complex and concrete to abstract nature of student learning and therefore, made a substantial effort to deconstruct complex concepts of EKG in to simple building blocks. We would like our readers to consider this book as one of the basic textbooks they use to build a strong foundation for advanced learning.