This document provides an overview of electrocardiogram (EKG or ECG) interpretation. It discusses how to determine the rate, rhythm, axis, intervals and segments of an EKG tracing. Specifically, it describes how to measure the heart rate, identify normal sinus rhythm versus conduction blocks, assess the P wave, PR interval, QRS duration, QT interval, and ST segment changes indicative of myocardial infarction. The document also reviews criteria for identifying left ventricular hypertrophy, right ventricular hypertrophy, left and right bundle branch blocks. The goal is to teach healthcare providers how to systematically evaluate EKG tracings.