This guidebook is written to assist in the transition between Internal Medicine Residency and Cardiology Fellowship; it is designed to highlight the most common clinical cases presented and how best to manage them. The topics have been carefully chosen to cover common differential diagnoses to symptoms. This book will give you a quick summary of what you need clinically to know about them as well as the challenges you may encounter in the process. Ideally, this handbook can be read in 1-2 weeks and consulted at any time during fellowship, but especially during the first year. By reading this guide, written by a current Cardiology Fellow in a busy program, the reader will benefit from fellows' actual experiences, both successes and missteps, which can aid the reader with patient care and case management. The guide includes managing the common clinical problems that patients are admitted for so the fellow will feel confident and display more accuracy in examining the patient, obtaining a focused medical history, writing a thorough and useful history and physical with appropriate work-up. Unlike the other few available guides or pocket books, this one will not address unnecessary and hard-to-remember details you may not need in day-to-day practice to deliver the most high-yield information in a short period. Since medicine residency may have only a few months of cardiology training, they may become less familiar in managing common diseases after months of training in other specialties (not to mention the time that traveling during match season and relocation takes). This book will prove to be efficient and effective even during this busy time. The focus of this guide will be the common management for chest pain, heart failure, arrhythmias, and so on. Also covered is a fellows-level summary for an echocardiogram, cardiac MRI, stress testing as well as interventional cardiology introduction. The primary resources and references we have used include the most recent articles that I encountered during fellowship and notes I made during daily lectures in fellowship and attending teaching points during rounds and conferences. This book offers years of experience from fellows and attendings, making you "ahead of the game". Also, we included the most relevant cornerstone cardiology studies summary as well as class 1 ACC/AHA guidelines summary.Amer Sayed, M.D.Cardiology FellowWestchester Medical Center, NY