Task: Answer Verification
Input (English): Question: Is fractionation of electrograms caused by colocalized conduction block and connexin disorganization in the absence of fibrosis as AF becomes persistent in the goat model?
Answer: Electrogram fractionation with increasing persistence of AF results from slow localized conduction or block associated with changes in atrial connexin distribution in the absence of fibrotic change.
Output (English): yes