Ambulation Analysis in Wearable ECG by Subhasis Chaudhuri

By Subhasis Chaudhuri

Ambulation research in Wearable ECG

Subhasis Chaudhuri, Tanmay Pawar, Siddhartha Duttagupta

Ambulation research in Wearable ECG demonstrates why, because of fresh advancements, the wearable ECG recorder substantiates an important innovation within the healthcare field.

About this book:

Examines the viability of wearable ECG in cardiac monitoring

Includes chapters written through practitioners who've individually constructed such to put in writing in regards to the details

Bridges the space among and algorithmic advancements with chapters that particularly talk about the points and their corresponding calibration issues

Presents an invaluable textual content for either practitioners and researchers in biomedical engineering and similar interdisciplinary fields

Assumes uncomplicated familiarity with electronic sign processing and linear algebra

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Additional resources for Ambulation Analysis in Wearable ECG

Example text

Data transfer interface like USB interface or serial link 6. Data transmission interface like interface with short range ECG wireless transmitter like infrared and Bluetooth. 1 Microcontroller Main digital modules of Silicon Locket are shown in Fig. 1. Low power microcontroller MSP430F149 from TI (Texas Instrument) was used in the first prototype of Silicon Locket [90]. 5V. 6µA [2]. On-chip 60KB flash memory is used for temporary storage of digital data as ECG is acquired and digitized in Silicon Locket [90].

In order to reduce the number of electrodes, feasibility of ground-free ECG recording with two electrodes has been investigated in [125]. Skin preparation prior to ECG recording is a standard practice in hospitals in order to reduce the artifacts. This involves removal of hair from the electrode sites, scrubbing of the sites with alcohol (spirit) wipes, and abrasion with abrasive pads. This can help for a short term (for a few minutes) monitoring. However, it has been concluded from the studies carried out on effect of skin preparations on generation of motion artifacts in [126] that the skin preparations are not very helpful for reducing the motion artifact in long term monitoring.

In [17], a study is performed on the use of wearable devices for monitoring the patient movement. From analysis of simultaneous traces of ECG and acceleration signals shown in [17], we conclude that the motion artifacts are generated in the ECG signal when there is an abrupt and significant change in the acceleration signal due to patient ambulation. Though the above studies have not quantitatively reported the impact of the levels of the body movement on the generation of motion artifacts in the ECG signal in ambulatory conditions, a reasonable conclusion is that the amount of motion artifact should be proportional to the level of the BMA in terms of body accelerations.

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