The third edition of this book is for primary care providers and any providers who encounter electrocardiograms (EKG) in their practices. It takes a clinical focus for the interpretation of EKGs, enhancing the understanding of complex conditions while providing a logical, practical application. It discusses and explains the pathophysiology of the conditions, which facilitates understanding rather than memorization. Throughout the book is useful clinical information that can be immediately applied to practice, as well as case studies with 12-lead EKG strips, which help to refine the reader’s EKG interpretation skills. This third edition is exceptional, with the inclusion of helpful tables that summarize complex information and useful illustrations to aid in visualization. Each end-of-chapter quiz features review questions designed to reinforce and enhance the learning objectives. The culmination of each chapter quizzes the reader’s mind and intuition with review questions to reinforce the learning objectives. The book delivers a compilation of narrative, diagrams, tables, actual patient EKGs, and case studies, which provides a complete yet succinct learning experience for the student and clinician. Providers are instrumental in identifying abnormalities on EKGs for further evaluation and treatment leading to life-saving measures. As the population ages, the incidence of abnormalities expressed on an EKG grows significantly, which poses a challenge to providers. Whether one is a nurse practitioner, physician assistant, or physician, the book is concise, to the point, and an absolute asset to one’s practice. It is an indispensable resource regardless of the experience level and whether one is learning for the first time or extending their knowledge and experience in the interpretation of an EKG.