Using lighthearted cartoons and mnemonic tools, this easy-to-read guide simplifies and clearly explains the heart and how it works. It covers the principles of ECG interpretation, to help you understand ECG rhythm and its relationship to cardiac electrophysiology. The 2nd edition features two new chapters on normal sinus rhythm and idioventricular rhythms. Over 100 NCLEX® examination-style questions are included, with 2-3 rhythm strips at the end of most chapters, and 30 more at the end of the book to practice interpretation.