The HRV analysis plays an important role in health monitoring. HRV is considered as a vital parameter for cardiac assessment. This paper deals with HRV analysis using ballistocardiogram (BCG) signal. The BCG signals from some subjects are acquired using piezoelectric sensors and National Instruments data acquisition card (DAQ) and processed using National Instruments LabVIEW. HRV indices are calculated using HRV analyzer in NI Biomedical workbench. In this paper it observed that the HRV indices in subjects having tachycardia and bradycardia were showing variations.