Question

Discuss the methodological factors which can impact the quality of EMG data and how could this be minimised or eliminated?

(Total 8 marks)

Answer 1

Electrocardiography (ECG) is an important tool in assessing the electrical activity of heart.There are multiple factors which affect the quality of ECG data.Firstly, preparation of patient is an important factor which impact quality of ECG. If the area of skin is not prepared properly, like presence of hair, oil or gel or dead skin hamper the conductivity of electrical signals through skin, which can distort the quality of report.Secondly presence of artifact can hamper the accuracy of data. Thirdly, accurate positioning of electrode is important, because in most times, major cause of misinterpretation is lead reversal. Forthly, positioning of patient is crucial in determining the accuracy of report.

To eliminate the factors, the one who takes ECG should position the patient properly, uncover the area of electrode placement, clean the area with cotton to reduce skin resistance, perform ECG in a noiseless environment, check the electrode placement after placing it etc