Abstract

The superior vena cava is a known arrhythmogenic structure since it can be a non pulmonary vein focus of atrial fibrillation but also a source of fibrillatory activity that in some cases has been reported to mimick atrial flutter. In this report, we demonstrate that another arrhythmogenic mechanism from this vein, that is localized reentry, can cause a specific pattern of atypical right flutter.

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