Given the comparative rarity of atrial flutter, this arrhythmia is often discussed, for convenience, alongside atrial fibrillation. This belies the wealth of information produced by considerable research into the former condition, and the clear clinical distinction between the two. Atrial flutter is manifested in a number of clinically separable forms, has a distinct aetiology and requires unique, specific ablation therapies. Further aspects of diagnosis and treatment are also well delineated, including electrophysiologic diagnosis, and drug-based, pacing, cardioversion and anticoagulation therapies. This monograph places current knowledge of and approaches to the mechanisms and management of atrial flutter in experimental and clinical perspective. The fourteenth volume of the Clinical Approaches to Tachyarrythmias series, Atrial Flutter is presented in a succinct format that will be convenient for clinical cardiologists, electrophysiologists and all those involved in the treatment of this arrhythmia.