Designed as a companion to ECGs Made Easy, 5th Edition, this online supplement reinforces concepts found in the textbook with dynamic videos, animations, and interactive exercises. Its content is organized to parallel the text's table of contents; most of the chapters include a Scenario Challenge case study with a sample rhythm strip and relevant clinical information for additional practice with ECG recognition. Developed by Barbara Aehlert, this online companion brings even the most difficult ECG concepts to life!