Nowadays, the advance in sensors network, integrated circuit and wireless communication technologies giving capability of designing lightweight and low-cost sensor nodes particularly for healthcare application. In this paper, a wearable belt-type ECG electrode worn around the chest is designed for sake of the convenience to measure real-time ECG. The measured ECG signals carry a lot of clinical information for a cardiologist especially for heart arrhythmia detection. DTW (dynamic time warping) method is applied on normal ECG and abnormal ECG to detect arrhythmia detection. Arrhythmia detection algorithm using MIT-BIH databases is performed for performance evaluation purpose.