The frequency and rate of either premature ventricular complexes or nonsustained ventricular tachycardia episodes as well as any transient conduction disturbance in a given patient with high risk features for sudden cardiac death (SCD) can be established with Holter monitoring and risk for future cardiac arrhythmic events predicted with reasonable probability. With the aid of published medical literature the present article discussed the role of nonsustained ventricular tachycardia and frequent premature ventricular complexes recorded with long-term Holter electrocardiography in predicting SCD associated with common cardiac disorders such as coronary heart disease, dilated and hypertrophic cardiomyopathy.