High density mapping of aortic cusps improves near field detection of pre-potentials during premature ventricular contractions.

Recognition of pre-potentials during activation mapping of aortic cusp premature ventricular contractions is useful to localize the precise site of origin and is an indicator of successful ablation, but sometimes these electrograms can be blunt and have low amplitude. High resolution mapping in the aortic cusp region allows improved near field detection of these signals in very few beats. [ABSTRACT FROM AUTHOR]