Key result
Historical electrophysiological studies established atrial flutter as a right atrial reentrant wave with a slow conduction zone, providing the anatomical target for modern ablative techniques.
This historical review highlights the evolution of understanding atrial flutter mechanisms, confirming it as a reentrant wave confined to the right atrium, which paved the way for modern ablative techniques.
Supports current flutter ablation targets; confirms historical reentry model but leaves open contemporary refinements.
For five decades, the mechanism of atrial flutter remained controversial, with protagonists and antagonists of circus movement versus ectopic focus theories. The development of clinical electrophysiology in the 1970s and the observations made by many authors in various canine heart models supported the concept of atrial flutter as a reentrant wave confined to the right atrium. It was established that, in the common type of atrial flutter, the activation wavefront proceeds in a cranial direction over the right atrial septum and descends on the right atrial free wall in the caudal direction. A zone of slow conduction was identified inferiorly and posteriorly in the right atrium, target of the modern ablative techniques. The history of atrial flutter clearly illustrates the bidirectional flow of information and the mutual stimulation between the basic and the clinical levels, leading both to a better understanding of the nature of the arrhythmia and to new therapeutic approaches.
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Mary-Rabine et al. (1997) conducted a review in Atrial flutter. Historical electrophysiological studies established atrial flutter as a right atrial reentrant wave with a slow conduction zone, providing the anatomical target for modern ablative techniques.
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