This book is aimed for the people who may want to learn how to design a microcontroller based ECG device with graphical LCD (GLCD) output. The book describes the design, theory, development, and construction of the ECG unit in detail including a complete program listing. The highly popular PIC16F877 microcontroller has been taken and used as an example in the book, although most other types of microcontrollers could also have been used. Chapter 1 is an introduction to the ECG system in general where various ECG waveforms are presented and explained. The block diagram of the project designed in this book is also given in this