EKG Explained and Intro to Electrocardiographs

Abstract: This application note provides an introduction to electrocardiographs (ECG or EKG) and discusses the basics of how heart signals are measured and displayed electronically. A broader review is given to the analog front-end (AFE) portion of an ECG device and how this signal path digitizes heart rate data. A variety of ECG applications are discussed, including automatic external defibrillators (AEDs), patient monitors, and higher end diagnostic ECGs, as well as the functional variations they may offer.