Design of a Wireless Single Arm Electrocardiograph System
Karthik Raj. V1*
, Tushar Sankaran J2, Soumya Samantaray2, Sayan Chakraborty2, Srishti Saxena21Department of Biomedical Engineering, Vel Tech Rangarajan Dr. Sagunthala R and D Institute of Science and Technology, Chennai, India, 600062.
2Department of Biomedical Engineering, SRM Institute of Science and Technology, Kattankulathur, India, 603203.
Corresponding Author E-mail: karthikhrajv@gmail.com
Abstract: Electrocardiograms (ECGs) are a method of assessment of cardiac electrical activity. It is the heart’s electrophysiological activity which occurs by the conduction of electrical impulses from the Sinoatrial (SA) node and the Atrioventricular (AV) node across the cardiac muscles and is displayed as a voltage-time graph. Conventionally, they have been acquired using a system of ten surface electrodes placed in different locations throughout the body in a 12-lead system. Single Arm ECG systems, where the ECG rhythm is obtained from only a single part of the body, replace the need for ten different electrodes to detect the heart's activity. Three pre-gelled electrodes are applied in different locations of the left arm to derive the sinus rhythm signal of a subject. An op-amp based hardware instrument has been developed for this purpose with active filters and amplifiers to perform signal conditioning. This paper demonstrates the implementation of a single arm hardware system of small size to improve portability, used as an ECG detection method and the results from various subjects taken at different gain values to improve the view of the signal, while also presenting a method to transmit the data of the signals wirelessly through an Internet-of-things (IoT) platform.
Keywords: Electrocardiograms; Internet-of-things; Lead system; Pregelled electrodes; Portability; Single-arm Back to TOC