title: P wave morphology in guiding the ablation strategy of focal atrial tachycardias and atrial flutter.
abstract: Focal atrial tachycardias arise preferentially from specific locations within the atria. Careful analysis of the P wave can provide useful information about the chamber and likely site of origin within that chamber. Macro-reentrant atrial flutter also tends to occur over a limited number of potential circuits. In this case, the ECG usually gives a guide to the chamber of origin, but unless it shows a specific morphology it is less useful in delineating the circuit involved. Nonetheless, prior knowledge of the likely chamber of origin helps to plan the ablation strategy.
authors.forename: Justin M S
authors.initials: JM
authors.lastname: Lee
authors.affiliation: Papworth Hospital NHS Foundation Trust, Papworth Everard, Cambridge, United Kingdom, CB23 3RE, UK. simon.fynn@nhs.net.
authors.forename: Simon P
authors.initials: SP
authors.lastname: Fynn
mesh_terms: D000465:Algorithms; D001282:Atrial Flutter / Q000503:physiopathology*; D017115:Catheter Ablation; D004562:Electrocardiography; D006325:Heart Atria / Q000503:physiopathology; D006801:Humans; D013610:Tachycardia / Q000503:physiopathology*