Effect of spatial resolution and filtering on mapping cardiac fibrillation.

Background: Endocardial mapping tools use variable interelectrode resolution, whereas body surface mapping tools use narrow bandpass filtering (BPF) to map fibrillatory mechanisms established by high-resolution optical imaging.

Objective: The purpose of this study was to study the effect of resolution and BPF on the underlying mechanism being mapped.

Methods: Hearts from 14 healthy New Zealand white rabbits were Langendorff perfused.