Flexible Capacitive Electrodes for Minimizing Motion Artifacts in Ambulatory Electrocardiograms

Abstract

This study proposes the use of flexible capacitive electrodes for reducing motion artifacts in a wearable electrocardiogram (ECG) device. The capacitive electrodes have conductive foam on their surface, a shield, an optimal input bias resistor, and guarding feedback. The electrodes are integrated in a chest belt, and the acquired signals are transmitted wirelessly for ambulatory heart rate monitoring. We experimentally validated the electrode performance with subjects standing and walking on a treadmill at speeds of up to 7 km/h. The results confirmed the highly accurate heart rate detection capacity of the developed system and its feasibility for daily-life ECG monitoring.

Means and Methods of the Upper Limbs Prostheses Control

“…Для таких вимірювань була розро-блена спеціальна система гнучких текстильних електродів, що представлена на рис. 1 [9].…”

Adaptive Noise Reduction Algorithm to Improve R Peak Detection in ECG Measured by Capacitive ECG Sensors

“…Because ECGs in other intervals than QRS interval are relatively weak in power, the ECGs measured from the cECG sensors are mainly used to effectively detect R peaks, which can be used to derive a lot of medical information. Because of the convenience of cECG sensors, they are widely used in many situations where conventional ECG measurement is difficult but necessary [3,4,5]. For example, ECG measurement cannot be easily performed while driving, but evaluation of a driver may be necessary to prevent emergency situations that can be caused if a driver has a heart attack or falls asleep while driving.…”

Non-Contact Simultaneous Measurements of Electrocardiogram and Respiratory Movements Using Capacitive Sheet Electrodes

“…Finally, we calculated the sensitivity and accuracy using Equations (2) and (3) for both ECG and RM signals [22]. In these equations, TP represents the number of target events (R wave, T wave, and RM) correctly detected in each output signal of our system, FN is the number of target events undetected by our system, and FP is the number of target events falsely detected by our system.…”

“…In these equations, TP represents the number of target events (R wave, T wave, and RM) correctly detected in each output signal of our system, FN is the number of target events undetected by our system, and FP is the number of target events falsely detected by our system. Since there are no countable valid events corresponding to true negative (TN), TN was set at zero in calculating accuracy [22].…”