About Cardiac Cadence
An ECG adventure for the curious, the committed, and the certification-bound - and the interactive companion built around it.
A book that started in front of a heart monitor
The Cardiac Dance began where a lot of careers in cardiac monitoring begin - in front of a hospital screen, watching rhythms cross a display at all hours. But it really took shape in a teaching role, where explaining why one interpretation made sense and another did not became a daily discipline.
Over and over, the same thing happened with bright, capable students: they would sit down to study cardiac rhythms, open a textbook, and feel the air leave the room. The pages were dense, the diagrams clinical, the language unfamiliar. By chapter three they were exhausted. By exam day they were memorizing without understanding.
This book - and this site - were built for those students. Cardiac rhythm interpretation is not difficult. It is unfamiliar. Every rhythm follows logical, learnable rules. The trick is to give your brain something to hold onto while it learns. That something is a place: Rhythm City, a music venue where every part of the heart is a room and every rhythm comes from a specific room.
A book can describe a rhythm. A screen can show it. This site renders all 53 rhythms - plus 4 common artifacts - as live, scrolling cardiac monitors - the way you will actually see them on the job - and turns every chapter quiz into an interactive self-test. It is the book brought to life, and a reference you can return to long after the exam.
The author
Mark K. Copeland, RCS, CRAT is a Registered Cardiac Sonographer and a Certified Rhythm Analysis Technician with more than a decade of combined experience in cardiac monitoring and clinical ECG education.
Monitor technician, Texas Medical Center
Began his career watching cardiac rhythms cross his screen at all hours in a major Houston hospital, working closely with nursing and physician teams to identify and respond to clinically significant arrhythmias.
Clinical ECG analyst
Moved to a clinical ECG monitoring company, producing rhythm reports for outpatient practices across the country - and was promoted multiple times over several years.
Company trainer
Rose to company trainer, the role responsible for teaching new analysts to read every strip to an unusually meticulous standard. Teaching forced him to articulate not just what a rhythm was, but why - and that discipline refined his eye in ways no clinical shift ever had. The teaching approach that became this book was developed and tested in that work.
The Cardiac Dance
His first book reflects a simple belief: that cardiac rhythm interpretation is not difficult, only unfamiliar - and that any student willing to walk through the heart's electrical venue systematically can master it.
He lives with his wife Clarissa and their children Kalian and Uriel - to whom the book is dedicated.
About the CRAT certification
This site primarily prepares you for the Certified Rhythm Analysis Technician (CRAT) credential, offered by Cardiovascular Credentialing International (CCI). The CRAT exam validates your ability to identify cardiac rhythms accurately, recognize clinically significant patterns, and demonstrate the foundational knowledge required to monitor cardiac patients.
Who should pursue CRAT
- Monitor technicians and telemetry technicians at hospitals and outpatient facilities.
- EKG technicians performing 12-lead ECGs and rhythm strip analysis.
- Cardiac care nurses and nursing students formalizing their rhythm interpretation skills.
- Allied health students and CNAs entering or transitioning into cardiac monitoring roles.
- Anyone preparing for advanced cardiac certifications who needs a rigorous foundation.
Because eligibility criteria, exam content outlines, and fees are updated periodically, candidates must consult the current CCI candidate handbook directly. Visit cci-online.org to download the most current CRAT examination handbook and review eligibility pathways.
This site is intended for educational purposes and CRAT exam preparation. It does not replace formal clinical training, supervised practice, or medical advice. All clinical decisions must be made by qualified healthcare professionals based on the individual patient's clinical context and current medical guidelines.
How to use this site
Read the chapters in order
The 14 chapters in Learn are sequenced deliberately. Each one assumes you remember the last.
Study the rhythms as they move
Use the Rhythm Library to see every rhythm live, with its five-step breakdown and clinical significance.
Take every quiz
Answer every practice question before checking your work. Retrieval is what builds long-term memory.
Run the Victory Lap last
Save the 20-question final exam for last. Aim for 80% or higher before scheduling your CRAT exam.