A Low-Cost Long-Life R-R Interval Telemeter with Automatic Gain Control for Various ECG Amplitudes

A low-cost R-R interval telemeter with automatic gain control is the innovative ECG measurement system for both clinical care and homecare. Highly-reliable R-R interval detection was achieved by the automatic gain control for subjects at different ages. The gain is automatically adjusted to extract R waves at the desired voltage amplitude. The high accuracy detection with automatic gain control was proved by the estimation of error occurrence at each subject. The errors of R-R interval detection did occur at less than 2% probabilities. The accuracy detection of long-term measurement is also a crucial issue for the appropriate diagnosis. The results showed 0.752% probabilities of reoccurring errors when 48 hours measurement was executed. Therefore, a low cost R-R interval telemeter with automatic gain control is the handheld device with the high accuracy detection of R waves and the high reliability of measurement at different ages.