Cosío, Francisco G.2018-03-132018-03-132017Cosío, F. G. (2017). Atrial Flutter, Typical and Atypical: A Review. Arrhythmia & Electrophysiology Review, 6(2), 55-62. DOI: 10.15420/aer.2017.5.22050-33692050-3377http://hdl.handle.net/11268/7117Clinical electrophysiology has made the traditional classification of rapid atrial rhythms into flutter and tachycardia of little clinical use. Electrophysiological studies have defined multiple mechanisms of tachycardia, both re-entrant and focal, with varying ECG morphologies and rates, authenticated by the results of catheter ablation of the focal triggers or critical isthmuses of re-entry circuits. In patients without a history of heart disease, cardiac surgery or catheter ablation, typical flutter ECG remains predictive of a right atrial re-entry circuit dependent on the inferior vena cava-tricuspid isthmus that can be very effectively treated by ablation, although late incidence of atrial fibrillation remains a problem. Secondary prevention, based on the treatment of associated atrial fibrillation risk factors, is emerging as a therapeutic option. In patients subjected to cardiac surgery or catheter ablation for the treatment of atrial fibrillation or showing atypical ECG patterns, macro-re-entrant and focal tachycardia mechanisms can be very complex and electrophysiological studies are necessary to guide ablation treatment in poorly tolerated cases.engjournal article10.15420/aer.2017.5.2restricted accessTaquicardiaCorazón -- EnfermedadesFibrilación auricularEnfermedad cardiovascularSistema cardiovascular