Can ventricular fibrillation, another major form of cardiac arrhythmia, be due to chronic virus infection, and if so, in what percent of cases?

This as well, approximately 98% of the time, is the case, that ventricular fibrillation is a downstream consequence of chronic viral infection in cardiac tissue. This weakens the heart and leads to conduction defects, and this can lead to extreme disruption of function resulting in fibrillation, and that can be fatal if not resolved quickly through medical intervention.