Based on virtual instrumentation, we developed an ECG monitoring system for fast evaluation of heart health. We use low cost components for data acquisition: USB experiment interface board K8055 designed for computer peripherals and EKG-V2 amplifier module for ECG signal. The system has low power consumption and is very easy to operate. Since the acquisition board works at low sampling frequency for a more accurate representation of ECG signal, a common interpolation detection method was used.