End point
Primary End Point: VTA
≥ One Risk Factors vs. No Risk Factors
≥ Two Risk Factors vs. No Risk Factors
Secondary End Point: Death/ or VTA
≥ One Risk Factors vs. No Risk Factors
≥ Two Risk Factors vs. No Risk Factors
Secondary End Point: Appropriate Shock Therapy
≥ One Risk Factors vs. No Risk Factors
≥ Two Risk Factors vs. No Risk Factors