title: Novel surface ECG criteria for differentiation between left- and right-sided manifest inferoseptal accessory pathways.
abstract: Differentiation between left- and right-sided inferoseptal accessory pathways by existing ECG algorithms is unsatisfactory. We reviewed the 12-lead ECGs of 113 consecutive patients undergoing successful ablation of a single manifest inferoseptal pathway (40% at the mitral, 60% at the tricuspid annulus). For prediction of a right-sided location, the most useful criteria were a) a negative QRS polarity in all three inferior leads and in V1 (positive predictive value (PPV) 0.90, negative predictive value (NPV) 0.51) and b) a negative QRS polarity in > or =2 inferior leads and in V1 (PPV 0.80, NPV 0.56). A positive QRS polarity in > or =1 inferior lead predicted a left-sided location (PPV 0.54, NPV 0.80). A new algorithm had an accuracy of 76%.
authors: Nikolaos
authors: N
authors: Dagres
authors: Kristina
authors: K
authors: Wasmer
authors: Gerold
authors: G
authors: Mönnig
authors: Anika
authors: A
authors: Ohlenburger
authors: Elias
authors: E
authors: Tsougos
authors: Dimitrios Th
authors: DT
authors: Kremastinos
authors: Martin
authors: M
authors: Borggrefe
authors: Günter
authors: G
authors: Breithardt
authors: Lars
authors: L
authors: Eckardt
mesh_terms: D004562:Electrocardiography / Q000295:instrumentation / Q000379:methods / Q000592:standards*; D006329:Heart Conduction System / Q000502:physiology*; D006346:Heart Septum / Q000502:physiology*; D006801:Humans