![]() Adenosine may diagnose the rhythm but is unlikely to terminate it.īeta-blockers & calcium channel blockers may be used first-line for chronic therapy of recurrent episodes, with catheter ablation the definitive treatment of choice. 5 Focal atrial tachycardia (FAT): Consistent, abnormal P wave morphology indicating an ectopic focus.ĭC cardioversion is likely to terminate the tachycardia, but some rhythms may recur.Įvidence for specific drug therapy is poor, with beta-blockers, calcium channel blockers and most anti-arrhythmic drugs having potential roles. Note the second P wave at the end of the ST/T wave, easily mistaken for an upright T wave.įigure 4.
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