Algorithm (Arruda) to localize accessory pathway in preexcitation syndrome

Mapping algorithm for localization of accessory pathway in the preexcitation syndrome using the morphology of the delta wave on the electrocardiogram.

R/S: R-S wave ratio; PPV: positive predictive value; LL: left lateral; LAL: left anterolateral; LP: left posterior; LPL: left posterolateral; CS/MCV: coronary sinus/middle cardiac vein; AS: right anteroseptal; MS: midseptal; LPS: left posteroseptal; RPS: right posteroseptal; RA: right anterior; RAP: right anterior paraseptal; RAL: right anterolateral; RL: right lateral; RP: right posterior; RPL: right posterolateral.

Data from Arruda M, Wang X, McClelland J, et al, Pacing Clin Electrophysiol 1993; 16:865.

Graphic 57692 Version 5.0

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Algorithm (Arruda) to localize accessory pathway in preexcitation syndrome