Task: Answer Verification
Input (English): Question: Does endocardial focal activation originating from Purkinje fibers play a role in the maintenance of long duration ventricular fibrillation?
Answer: Repetitive endocardial focal activations in the LV endocardium may be associated with activation of subendocardial PFs. This mechanism may play an important role in the maintenance of LDVF.
Output (English): yes