When I was in PA school, I searched for full-length books on EKG interpretation and could only find slim volumes whose titles claimed each one was the best or the only necessary book on the topic. They all seemed to have one or two illustrations of any rhythm you might need to know about. And those illustrations were textbook kind of pictures, idealized and very different from rhythms you might see. The same was true for full 12-lead EKGs in these books. The reader was asked to memorize a picture that was unlikely to show up in actual practice.
This book, 633 pages long and the approximately the size of an EKG, provides many examples — reproductions of actual EKs — of each rhythm discussed. And those discussions are lengthy, enjoyable and easy to comprehend. The book makes extensive and intelligent use of color to illustrate points. The PR interval, for example, is broken into seven distinct sub-intervals, each of which is explained.
Chapter 33 is on how to approach a wide complex tachycardia. The authors discuss the kind of EKG findings that tip the scale in favor of a ventricular rhythm.
Valuable tips are found throughout the book, including that “if the P wave is not upright in leads I, II and V5 to V6, then it originated in some ectopic focus.”
Every chapter is followed by about twenty self-test questions, with answers and explanations provided.
You can find this book used for about $50 (and sometimes as low as $30) on Amazon.com and it is well worth it.