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A Holter is a portable device for continuously monitoring the electrical activity of the heart for 24 hours with a data analysis and processing feature. It is designed with an integrated circuit that has a low electricity consumption and superior performance based on an 8-bit micro-controller and flash memory stick. It is classified as a “Device Type 2” system of ambulatory electrocardiograph selected by AAMI (Association for the Advancement of Medical Instrumentation) for its portable size and low price range.


Recently, cardiovascular disease has risen sharply due to westernized food habits and an increasingly aging population.
According to statistics reported in 1998, the leading cause of death, respiratory disease, accounted for 23.9%, and ten times as many people suffer from heart disease as 30 years ago and seven times as many compared to 20 years ago. Consequently, most hospitals devote their efforts to offering high-quality medical service and educational programs for treatment of cardiovascular disease with high-tech equipment and competent medical professionals. The electrocardiograph (ECG) records electrical signals from the heart via a series of electrodes attached to the chest to diagnose cardiac activities such as arrhythmia, hypertrophy, infarction, and ischemia.
The 24-hour electrocardiography is used to observe patient’s cardiac statistics such as heart rate and electrocardiogram followed by computer analysis of the recorded data which counts ECG complexes to identify cardiac arrhythmias and ischemia. However, these 24-hour electrocardiography systems are not available domestically so they solely depend on imports.